Reinstalling dynamo in revit 2021 or later

[sovitek]

Hello sounds more as something here, than reinstall…

3d preview & 3d watch not working

Per your Dynamo log: Looks like you will need to find Dynamo and force it to use the discrete card as well. You may have to add it to your card’s list of applications. If after forcing the card you still don’t have graphics, create a ticket by logging into your Autodesk account at manage.autodesk.com, and submit a support request as you would with Revit or any other Autodesk product.