I have one of those toddlers who speaks in sentences, sings full nursery rhymes, recognises numbers etc and I can assure you I have done absolutely nothing special at all. I truly believe that every child is different (I'm a teacher and see this every day). 50 words sounds great! And as the above post says, 3 months is a big gap at this point. My boy didn't say mummy until 16mo and 8 months later he's taken off. You're doing a fantastic job and Instagram doesn't always tell the whole story. I posted a holiday on there last month which looked like we had the best time with my 3mo and 23mo, people even messaged me about it. In reality we came home early as it was so hard and we weren't enjoying ourselves.
i agree with the comments above - 3 months is a lot at this age, influencers tend to only show the highlights, and it sounds like your child is doing great anyway! if this account is making you question things, i'd unfollow or at least limit how much you're seeing it - social media should work for you and add something to your life, not make you feel like you're doing something wrong. you're doing brilliantly and so is your little one xx
3 months is a lot at this age, they change and develop so quickly. If I look back at my son 3 months ago he’s changed s lot. Also always take the influencer content with a pinch of salt cause they’re generally known for embellishing things