I had my son in the spring of 2020 and we never wear masks, take him out to do activities all the time, he's met all his milestones and isn't fully talking but has about 50+ words or so and we can communicate. I am not worried about him, a pre-school teacher I know said lots of kids his age were behind in talking and social skills- and we live in a pretty decent state. We didn't do as much as we did with my older child the first year of his life (he was around older kids, his sibling, and adults somewhat frequently) and when we went on a major road trip around his first birthday he really blossomed. So I believe the developmental issues are not due to "covid" (FWIW we all got Covid a month ago and my kids had no symptoms) its the parents. If they're forcing their kids to mask up or be in an environment like daycare where everyone is wearing masks it's going to affect them learning speech and social skills. Not to mention many parents who haven't let their kids leave the house or play with other kids, teaching them to be neurotic and afraid of each other. Humans need socialization.
My advice would be to still take your child places, no matter the age and have them be around people. The first year they don't need to be in school or anything, they just learn by watching and playing and then maybe later do some supplementary activities (we did swimming at a very early age because we live somewhere where there are many pools and it's hot, that is a good idea too but not necessary if you don't have bodies of water/pools that you plan on visiting) with likeminded (not mask wearing preferably Christian) families and your kid will be fine. Do lots of reading starting at birth! If you live somewhere like LA, SF, NYC, Seattle etc consider moving if you don't have a community : )