I was trying to install mac os Ventura and this happened

Connect your wireless keyboard with its charging cable to the Mac; it will act as a wired keyboard. You may need to restart.

Every Mac user needs to own a [cheap] wired USB mouse and keyboard for exactly these circumstances.

Try and use a wired keyboard and mouse to go to the installation, after that you can try and use the bluetooth ones again

Why not look for some old Apple computer stuff on eBay maybe an iMac g3 mouse and keyboard would work

Buy one. Or borrow one.