That would be considered as a "Repair". You can claim that as an expense in 2022.
How did you determine that? OP clearly states, " converted my home into a rental on 4/28/2022. In preparation, I refinished my existing hardwood floors in November 2021."
The refinish was done a full 6 months before the property was converted, and most likely they were still living in it as their primary residence. While it is considered a repair, it's definitely not deductible anywhere on the tax return; especially not on the SCH E. Doesn't matter that it was "in preparation" for converting it to a rental or anything. The property was not in service as a rental anywhere close to Nov. 2021. Not even the same tax year for that matter.
