First, remember that this program is very minimal in terms of SBD volume. For the most part, you’re only doing each lift once a week for one hard set and a couple back-off sets. This amount of strength work is unlikely to interfere with your hypertrophy goals in any significant way and may actually be beneficial if it allows you to overload other lifts more effectively. Still, if you want to avoid the powerlifts altogether due to injury or preference, there are two substitution options for each lift that you can do instead of the powerlifts. After substituting the exercise, keep the sets, reps, and everything else exactly the same. This will ensure that you still get some general strength work in. For example, if the program calls for 1 set of 2 reps on the deadlift, you could substitute this for 1 set of 2 reps on either the trap bar deadlift or the barbell hip thrust.
As a second option, if you really don’t want to do any strength work at all, you can simply set a low-end rep cap at 4 reps for the entirety of the program. This means you simply won’t do any sets below 4 reps. In this case, if a set calls for 1, 2 or 3 reps, you will simply do 4 reps instead. So, for example, if the program suggests that you do 1 set of 2 reps on the deadlift, you could substitute this for 1 set of 4 reps on either the deadlift, trap bar deadlift, or barbell hip thrust. If a set calls for 4 or more reps, simply keep the reps the same. In the event that a set calls for 3-5 reps, just do 4-5 reps instead of 3-5. I wouldn’t necessarily prefer this option because I do think strength work is important. However, if you don’t want to do any strength work, there isn’t a big issue in just replacing the sets below 4 reps as explained above.
In either case, because the direct strength work is quite low in this program, this should be a very easy work-around.