Geometry Nodes in the 2.93 Alpha

I had a question about geometry nodes in the 2.93 alpha. I tried opening a 2.92 file in 2.93 to fully use the sample texture attribute. But the option to switch the texture from brush to geometry nodes in the texture panel was missing. Im not sure if its a bug or not. I loaded up a fresh 2.93 file and the options was there as it should be. has anyone else had this problem? I really dont want to start my file over again. !