Was on a Teto binge and looking up images like these to find songs, so I made an attempt over the course of a few days when I saw the lack of tags. Only Teto I haven't figured out is the one with the smartphone. The Teto with the guitar in the bottom left is from a niche sub-1k channel the artist works with where she's in a high school band.

Turns out this image is still being updated with new Tetos every day and it's currently on day 45(as of this comment) while this is 27. Each version/post usually links the inspiration, but not the smartphone one.