Will I lose strength if I temporarily pause 5x5 for low weights and high reps?

I'm currently recovering from a lower back injury so I'm unable to do 5x5 for squat and deadlift. My doctor, PT, and chiropractor recommended me doing low weights and high reps and if I do that, will I lose my strength? I finally got back onto two plates (and no, I didn't hurt my back doing them) and I would be a little sad if I'm not able to get back to two plates when I fully recover.

I know this is a 5x5 sub, but is there a program I can follow with low weights and high reps where I can still build strength and get back to two plates or more when I fully recover?

Thanks all!