to be honest I've seen conflicting info on the web
since 2021 needs amending, I would recommend amending 2022 and 2023. If the IRS looks at the 2024 8582, likely, they'll only look back to 2023 and see a discrepancy. It won't realize 2021 has been amended. if this happens you would have to deal with correspondence with the IRS that you may not receive until it's too late to amend 2022 and hence revise the c/f loss to 2023 and 2024. Also, if you have multiple properties and made use of the $25,000 special allowance, amending all years is needed because each property gets an allocation of the $25K which would change the separate properties PAL c/o. This would be important should you dispose of any of them.
see if others give you their opinion.
