lifters still not spinning

"who told you that you needed to check lifter rotation? Sounds like an old wives tale."

Well, for me, it's part of assembly. The builder should check everything

This is how I do it:
I only use WD40. Oil's too thick, and dry the lifter probably won't rotate. You dont need any load on the lifter. So I spray the cam with WD40, and isntall. Install the cam gear only on it (no chain). Then spray the lifter faces and sides with WD40, and isntall. Mark the top of each lifter and bore. Then rotate the cam clockwise and look for the marks to move. It's only about 15-20° each lift cycle. If some dont turn, I'll swap a few arund until they all do.
that's it. I've never lost a cam, even using aggressive flat tappet profiles doing this.