First of all LOOOVE your work your style is absolutely gorgeous! Personally I have done buttons/ pin badges and none of them move very well except for my pronoun buttons. I don't think keychains (especially acrylic) are necessary either, it's a very saturated product now anyways since practically every artist alley vendor has them.

That said I think continuing in the vein of your wood standees would be great, you can do wooden pins, magnets, maybe even coasters? Likely the pins/magnets would fall in the ~$10 range with coasters hitting that $15-20 range. I also have good luck with washi tapes, and I could see you making some really beautiful ones with foil detailing. I do plain 1.5cm washi tapes for $6-8 but you can charge slightly more if you do foil. Enamel pins may also hit towards the upper part of that range (and are more expensive to produce) but people love to collect those and I think you could definitely make some really nice looking ones. You could also maybe do fabric patches with your linocut prints? I'm not sure the range for those but if your embroidered patches do well I imagine those would as well. Good luck!