Kid control plus hotspot access?

Hi everyone! I need some help with the following:
The task is to allow the kids free internet access for a giver period of time (what I’ve solved via hotspot trial time feature). But I need in addition to this to allow access by schedule for a learning purposes (remote education due to lockdown). So I need to couple hotspot with kid control somehow, but they seem to be unrelated. The schedule should be quite flexible, for it’s subject to change.
Currently hotspot is bound to separate bridge with separate IP subnet. Same devices may be connected via hotspot and the other way, so the same MAC may get different IPs.
Any ideas?