My advice to retain your sanity: stop using Time Machine and use Carbon Copy Cloner [0] instead. It works. It keeps working. It has excellent documentation for any possible backup and restore cases. It is transparent about what it is doing.
Time Machine works fine until it doesn't. And it won't tell you that a backup is broken until you try to restore from it. The errors are going to be cryptic. There is going to be no support and the forums are not going to help. The broken backup is not going to be able to be repaired. Time Machine uses the "fuck you user" approach of not providing any information about what it does, or doesn't, or intends to do or whatever.
If your data is worth backing up, don't use Time Machine.
Time Machine works fine until it doesn't. And it won't tell you that a backup is broken until you try to restore from it. The errors are going to be cryptic. There is going to be no support and the forums are not going to help. The broken backup is not going to be able to be repaired. Time Machine uses the "fuck you user" approach of not providing any information about what it does, or doesn't, or intends to do or whatever.
If your data is worth backing up, don't use Time Machine.
[0] https://bombich.com