This is not a specific LOS issue. We have been waiting for Fairphone to provide this capability for third party apps for about a year now. In the first post of Camera & Camera2 API - missing features & bugs all problems regarding third party camera apps are mentioned. E.G.:
Maybe this is the problem and Fairphone has to solve it:
This applies to stock ROM as well as all custom ROMs. CalyxOS has developed a patch that bypasses the SYSTEM_CAMERA permission check. This has also been adopted in LOS and iodéOS. Therefore, thanks to Calyx, at least the wide-angle camera now works. But all other problems seem to persist. Fairphone has unfortunately given up working on solutions for this in the meantime. Only with a lot of luck will they find the time and energy to work on it again sometime in the future: