There is no solution for the microsoft store version. The folder structure and files are different because of changes by Microsoft.
A lot of mods work by renaming files and folders, however that doesn't work for BO. Making the xbox game pass compatible isn't a quick fix.
The popular single player mod Butterlib is a good example that has the same issue and they've been working weeks on it. The BO devs do not have time to focus on Microsoft store atm.