My 10YO son begged for workbooks last year, so I found one at Sam’s Club for about $8 and it covered spelling, language comprehesion (this was actually very helpful to him), math, and reading. Some of it was way below his ability while some of it was more challenging. It was for 4th grade.
I basically used it as supplement, and he would do it as he wanted. I never assigned it per se, but he would often want to do a page so I would check it. He would use it also at times where I needed him to stay busy while I worked with someone else, and it was one of his “free choices” (others include reading, creative writing, drawing).
This year, he hasn’t mentioned any workbooks LOL! I think he got it out of his system, but if I were you, I would allow some and just make sure it isn’t the primary focus. Make light of it and your son will probably lose interest, but even if he doesn’t I think it is fine in moderation.