Anyone here who has a child exposed to screen 2-3 hrs a day and not have speech delay?

Hello fellow parents. I have a 15-month old. He still can’t talk. Today though he’s starting to say “mama” while crying. Only when he needs something from me. Anyway, I’d like to know if speech delay is caused by giving your child a lot of screen time or if it just depends like any other milestones. My son watches TV 2-3 hours a day but mostly 2 hours. I’m wondering if screen time is the one to be blamed. Any parent here can debunk this? If it matters, I do talk to him a lot. I use two languages and my husband use another language, so he hears three languages everyday.