Saying flat out “no” isn’t something I’d do. Clearly, as per the above, rest-pause and 531 can be combined. It just can’t be tacked onto every template.
If I were to gel the two during my anchor I’d do it differently, but that’s just me.
I’d stick with OG 531 for the main lifts, do no supplemental work and 2-3 assistance exercises with a preference towards machines/isolation that’d run
Week 1: to failure
Week 2: rest-pause
Week 3: double rest-pause.