It’s hard making clothes with no sewing but here are a few items suitable for small dolls and accessories for bigger ones and children.
For American Dolls.
(I find with minor adjustment these clothes fit 14 inch and above dolls well)
Valentines Day Outfit many others on this site
No sew Swimming Costume (youtube video)
Baby size clothes
Super Hero Costumes can be adjusted for most sizes
No Sew Fleece hat all sizes
DIY no sew bow ties can be used on headbands also. This link includes some other no sew hacks
DIY Bow back tank top can be done with any size top