Ingredients like ashwagandha have research showing a variety of benefits for healthy young people (not only low-T), including increased endurance and strength, improved libido, cognition, and body composition, and reduced cortisol, stress, and anxiety.
Forskolin has been shown to improve body composition.
Tongkat ali has been shown to reduce cortisol and improve mood.
These benefits come primarily from MoAs besides increasing testosterone, but are still real, and still useful. Of course, be realistic in your expectations.
I’d look for products with full roses of these ingredients, although there are some other good ones, like shilajit. AlphaMax XT has full doses of ashwagandha, forskolin, and tongkat ali, as well as other useful ingredients.
As to your other question, no for deer antler spray increasing IGF-1.