Yes, you need to go back to the year you converted your Rental to Personal to see the amount of Depreciation Taken (Form 4562, landscape).
You can add your Rental Property asset back, with a Cost Basis of your original Cost Basis, less Depreciation Taken, unless you have added Improvements to increase the basis while you were living there.
Yes, you can report your Carryover Passive Activity Loss amount in the Rental section.
You don't want 'at risk disallowed' to have an amount; that would mean that part of your at-risk loss is disallowed.
Your carryover loss from 2020 may or may not be able to be used in 2023. If not, your 2023 loss will be added to the amount and continue to carry over, until able to be used or property is sold.
Unclear as to what you are referring to as '179 Carryover loss'. This would apply to a Rental Asset (not the house). If you had one in 2020, you can enter it, but you don't want to create one.
Here's detailed info on At-Risk Limitations you may find helpful, as well as more info on Depreciation of Business Assets.
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