I think there are a couple things at play here:
Your React version is 18.3.1 which is the React 19 compat version with deprecation warnings to prepare you for React 19. You can see that in their upgrade guide here: React 19 Upgrade Guide – React
The version of RTL you’re using is a bit old at this point and my guess the import warnings comes from this library. v16 added support for React 19, and my guess the updated import was a part of this.
I’d suggest either downgrading React to 18.2 or try upgrading RTL to see if that fixes it.