I believe Re-ments are meant to be 1/12 sized, so they should work the best for Picco Neemos as those are in the same scale. Many people do use Re-ments for 1/6 scale Pure Neemos as well and it does work too! Yo-SDs are considered as 1/6 scale among the BJDs, but their proportions are very different compared to Pure Neemos, so they look different with Re-ments as well.
I'm only sharing my personal opinions along these photos, everyone can decide from themselves what they think and what doll size they would use these props for :)
I'd say that that the furniture are too small for yo-SDs in terms of realism, but the food and such work fine! The Rilakkuma table set might work for a kid's room etc. but not necessarily as a more realistic cafe setting ^^; Lulu seemed to fell in love with that tasty-looking cake piece...
I also compared Lulu with the Rilakkuma kotatsu that I have, again this gives off a child's room type of feeling :3 The size is not too bad, but it is a bit on the small side. She was wearing boots and her feet wouldn't fit under the table if the toes were facing upwards, she would've lifted the whole thing from the ground with her feet XD
But still... Yo-SDs have their cutesy factor so it's not like they'd look stupid with anything u_u
Here are two of my Azones with the same kotatsu, I think this looks a lot better :3
And also with the cafe setting~ Shiori (left) has the M body and her legs are maybe a bit too long, so this table set would work better for S body, even though there's not that much of a difference. Little Miu on the other hand might look tiny here, but I imagine my Picco Neemos being younger than their "big sisters" so it doesn't bother me.
I hope someone found these helpful! ^^