I saw an article on YouTube that said acrylics can and should be steamed blocked if it is a garment. The only caution given was to make certain the hot iron does not come into direct contact with any fiber containing acrylic.
So I clean the item, usually in the washer, spin gently to remove most of the water . Then I pin it and cover with a damp towel(s) and use my iron to go over the entire item until the towel(s) are as dry as I can get them.
I allow the knitted garment to finish air drying after I remove the towel.
I have a lot of compliments because my gift doesn’t look hand made.
Of course I never bother with toys or knitted towels.
So, with acrylic, try both blocking and not blocking. You may feel blocking acrylic is not worth the time and effort involved…or maybe some things are.
Good luck and keep knitting.