How do children with speech delay usually manage in reception?

[ThisRareOtter]

My son is 4 next month, and will start reception in September. He's still struggling with pronouncing some sounds, such as "ck" and "g", which I think is called "fronting" from my extensive googling!
I'm really worried about how he will fair in reception. Surely his progress with reading is going to be hampered if he can't make the sounds he need to do in phonics. He's on the waitlist for speech therapy but nobody can tell me how long we might be waiting. I wish we could afford to go privately but it's so out of reach for us at £100 ish per session.

Does anyone have any experience of how their child got along in reception if they've had speech delay? Any teachers with any experience? I feel dreadfully guilty that we can't afford to get him help before he starts.

I think a lot of reception teachers will be familiar with children with similar delays so should have strategies in place to support. My son was non verbal when he started reception but as a young is writing his second novel so it all worked out ok!

These stories are giving me so much hope, thank you to everyone who has taken the time to reply. I'll stop flogging myself with the mum guilt now!!