The weight is 25 pounds and it don’t have for height but his feet hang at the end of the car seat and he just look uncomfortable

They can fit it for awhile but most convertibles now can seat infant through whatever front facing weight my son has an infant one for my car and convertible for my MIL. Both safe

We switched him to a convertible seat at 4/5 months. He hadn’t outgrown the infant seat yet but he was getting too heavy for me to carry in it. So we just switched him.

Your manual should have the height/weight limits. Might even say on the seat itself