I'd like to thank you all for the valuable information. Just ordered a spirit frameset (rockshox shock included). As mentioned here, my idea is a DYI ebike, using the frame space for max range, using a local battery manufacturer in Brazil that make battery packs designed to fit the frame (https://www.ipedal.com.br/baterias-sob-medida ). I have a Bafang BBSHD, but I'll probably get a CYC Photon for this build (a bit less power, maybe more gentle on the frame). https://www.cycmotor.com/product-page/photon-750w-mid-drive-conversion-kit
There's a very comprehensive critic video review by a russian youtuber that is also very informative of things to pay attention (link broken, just search lexon spirit carbon frame 2022).
I've had other frames with rear suspension link problems, which I've solved using a single axle through both left and right link bearings. Adapted suspension link is holding up well. My guess is bearings don't like torsional loads. Pictures can be found on this page (it's a brazilian bike forum) https://www.pedal.com.br/forum/topic81719_post1668631.html#1668631
I can't tell yet if the Spirit wishbone link behind the seatpost tube would accommodate a similar solution, because of possible interference with the frame depending on the travel.
It will be my first carbon frame, and I like to fix things, so I'll just enjoy the journey and try to implement some improvements as I put the bike together before riding, hoping to extend its life.