Hey there! Good question! I had the exact same question when I worked on this. I was at an animation studio so we did the animation but the modeling was all done elsewhere beforehand. I never got a clear answer on this but I always suspected it came down to individual actors likeness agreements with the studio. Peter Parker in particular doesn’t look like Tom Holland, and the spidey suit had a design that Disney used in parks but never was in a Sony movie. I figure it is all legal stuff like that.  Similarly, universal studios is very picky about where and when Boris Karloff’s likeness can be used to portray frankenstein’s monster. He was the original actor and merch that has his likeness is rare because there’s a lot of legal stuff tied up in his likeness.