Trying to install from ISO, but mouse not recognized

I am running the installation of RHEL 7.8 from USB disk on DGX station. I have USB keyboard and mouse.
I can only use the keyboard. The mouse is inactive. So I cannot advance past the stage of language selection (the first stage of installation).

But when I reboot into the Ubuntu which is installed on the machine, the mouse and keyboard both function well.

Can anyone advise what to do to be able to install RHEL?