The all important First Impression:
For starters I love the picture you have of Riley as your icon. It's bright, it's active and fun. Exactly what you want to express. When I first go to your channel I see a big, bright banner, but I would like to have seen a little more information about your channel there. Not a terrible decision, but I feel it is important to make things as easy for the viewer as possible and that means a captivating channel value-proposition right up front.
I do see some glaring issues on the channel though. I go to look for a video and am greeted with a recent example of your work as a channel intro. I like that. Until you are able to really put together a solid channel trailer it is a good practice to use your best performing video as an intro. Best foot forward! But I want to see more of your work so I scroll down. And the very first shelf of videos that I see are your Shorts videos. This is a very poor decision. You need to have a shelf of your absolute best work here. A viewer is only going to invest so much time in looking through your channel and you need to grab them immediately. These Shorts have no custom thumbnails, they haven't performed for you and they are taking up prime real estate.
The next shelf is your basic Uploads shelf and that is fine. It gives us look into what we are seeing from your channel most recently. But again, those thumbnails are poor. This is a kids channel... and there is no way those thumbnails are going to compete against the spastic, color-bomb thumbnails targeted at kids.
My wife and I watched several videos and your content is solid. Filmed well, edited very well and Riley has the personality to be a superstar. Great energy. I found it a little strange that you put a channel-intro at the end of a recent video, and I had some issues with your decisions in the 'I Quit' video. You knew exactly what you were doing; you were compelling viewers to click with the stark, black-and-white thumbnail and the dramatic 'I quit' title and text. But the first thing Riley says is 'Ok, I don't quit but...' and proceeds to ask for insight into the things that she should be making videos about. That is clickbait. It has a misleading intention and that compromises the trust your audience has in you.
Looking into the metadata for one of your videos I also found some missed opportunities. Obviously I highly encourage you to consider taking the time to complete your Best Practices. There is a reason this information is tracked by YouTube and it is worth taking the time to utilize these as a means of creating more views and garnering more exposure.
You have some good keyword phrases in the your tags, but there is a lot of space used for tags like 'fidget,' 'for kids' ad 'fun.' There is no way you are going to rank for these terms. You are telling YouTube that this video is about these things, YouTube is going to pit your video against others which currently rank for these terms and you are not going to be able to compete against them. This is effectively going to bury your video as a possibility for ranking. I suggest doing keyword research for the 'other' longtail keyword phrases that people search. Instead of 'fidget' focus your metadata and even the video itself on a hyper-focused subject like 'whats better than a fidget spinner,' 'best fidget toys 2022' etc.
Also, these tags are the least important part of your SEO. While you do have some decent keyword phrases in the tags you do not feature them in the first 200 characters of description of the video... which is the place YouTube actually looks when they are determining what your video is about. The description gives YouTube little to no information at all about what this video is about. What's worse is the title. YouTube treats the beginning of the title as a sort of Supertag. From YT's point of view your videos is about 'fidgit this,' 'rate my top fidgits,' this I rate my top...' you can see that this title can be a little confusing to YouTube. Also, is it compelling? What here is really creating a strong desire for a viewer to click as they scroll through their feed or search?
I would suggest picking your stronger series of hyper-focused keywords, making sure to have them in the first 200 characters of the descriptions and as the beginning of the title. Title your video: 'What's Better Than a Fidget Spinner? AMAZING Fidget Toys 2022' and if you really feel the need to have those hashtags do so at the end of the title. That is a stronger, more compelling use of the title's real estate.
Ok, I'm running out of my character limit here so I got to stop. Hope this provides some assistance and I look forward to seeing what others say!