9 month old still not eating solids

"Food before 1 is just for fun"
I don't know what country you're in but I assume people there don't follow this mantra?

I would say eat in front of him and have plenty of baby friendly pieces of fruit veg meat pasta etc on the plate where he can reach them. Allow him to feel, squish, smell, lick and maybe even taste as much as possible.

His main calories should still be his formula. Think of food as a supplement.

My daughter was like this at 9 months, and a week or two later, she turned a corner and started being more receptive to eating. This was very recent, she is turning 10 mo in a few days. I'd say keep trying and it's great you have specialists lined up, as well.

My son was the exact same. He’s almost 10 months now and has finally started eating, he will only eat chicken, fish and watermelons though 😅 he does open his mouth to try new things but always spits them out

My son was the same from 6-12 months then after he turned 1 something changed and he was like a different baby started eating everything and has been eating really well since. You’re doing everything you should be and doing a great job! He will get there xxx