New Nvidia functions permit the coder to check if the texels are mapped to uncommitted memory, also to specify mininum amount of detail,the reading of uncommited memory will execute by returning zero and much more.
All available on Mesa22.
Links
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_sparse_texture2.txt
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14362