Suse released sles 15 SP7 technology preview images a couple days ago. These images are released for testing compatibility with new service packs and for POC's.
In the meantime, i created new branches (ending in _SP7) for every bitcoin core version in the github repo, and i have succesfully built each version on sles 15 SP7. The images were only uploaded into github's docker repo:
https://github.com/mocacinno/bitcoin_core_docker/pkgs/container/mocacinno%2Fbitcoin_core_docker/versions?filters%5Bversion_type%5D=taggedEverything builds, but nothing was tested... If you want to help out, feel free to pull some _SP7 images and try if you can run them. If not, let me know (or create a fork, fix the issue and create a pull request).
Only use _SP7 images for testing, do not use them in production. The _SP7 branches will be merged into their respective branches once SP7 is actually maintained!!! _SP7 branches will not be added to the documentation either, these branches will seize to exist once SP7 is actually released.