Yes, Premiere Pro 2021 (15.0.0) is treated as a different application from Premiere Pro 2020, so you also need to grant it permissions.
I'm not sure that you need Disk Write Access though, this one will be requested by Premiere Pro itself.
Also there is a problem sometimes when macOS doesn't read permissions properly. In that case you need to reset them:
- give permissions to Premiere Pro (accessibility/input monitoring), skip if permissions already granted
- untick Premiere Pro in permissions
- restart computer
- tick Premiere Pro back in permissions
- launch Premiere Pro and test