Like does he get stronger when he gets bigger?

I saw a scan of him when he grew 4 arms to help Superman & Wonder Woman pull the earth.

Not necessarily, but yes.

He should be. More muscles = more strength.

We honestly do no know it’s never really explained in the comics but I suppose it gives him more strength although it’s weird he’s already s tier in strength so if he gets bigger does his strength double ?

I think in terms of strength, it is manipulated where through density shifting, binding his biomorphic structure into tighter bundles, he can increase his already massive strength without a stated limit as yet. So I’d say simply shapeshifting, not necessarily, it is probably just him being insanely strong already. However sometimes he can add the density shift (instead of becoming intangible, shifting the other way to become even more of a brick) to it, like I’d imagine he did with the four arm thing for maximum strength.

This ones pretty iffy lol.