what i did in my last two builds with accetable result:
i ordered those little inserts here.
https://www.amazon.de/gp/product/B082KFQV71/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
then i drilled a little pilot hole, added some titebond glue to the insert and hammered it gently in the hole. i made sure that the insert is a little bit above the surface so it could hold a washer. then i use m2 screws, which are smaller than the single coil screw holes (so i dont ruin them) and use half of a humbucker mounting spring to mount it under tension. so the parts are insert > washer > spring > screw. with that the spring tension is lying on the washer. this is important because the inserts are too small and weak to hold the tension by themself.
an easier option would be to directly use m2 or even m2.5 wood screws with soft springs but since the screws are so small, you will not be able to turn them in or out without ruining the drill hole in the wood.