can someone help me on how to fix this
to find the texture in the Unlit Material do the following:
I hope that helps and in case you're not able to find it:
That might be a bug or an issue in the Lens Studio version you're using,
I have the latest update of Lens Studio 4.43 and I tested it with the Unlit Material and it seems to work fine with me make sure your Lens Studio is updated so you don't face any issues or bugs in the future.