Is this possible

one 5.7 point to point to 5.7 to cmm, on that cmm a access point and another backhaul plugged into the cmm shooting to another location

yes…

you can have as many of each as you want… but you have to configure all the kit correctly, plan freq and arrane the kit correctly on the location

also for every hop you plan on doing it adds latency.

yes that is true…

In theory it should be 2.5ms but I see more like 10ms per hop on BH’s