The facts you presented are fairly complicated in terms of previous transactions and mixed use of the property but the result in terms of the property being placed in service as a rental again in 2023 are seemingly fairly simple.
You would use the lesser of the fair market value on the date of conversion to rental use in 2023 or your adjusted basis. In your case, it seems fairly clear that your adjusted basis is going to be far lower than the fair market value so you would use your adjusted basis as your basis for depreciation.
