Remotely configure network access for Zyxel EX3301-T0

I have a Zyxel EX3301-T0, and would like to be able to control network access on it (for a predefined set of devices) from Home Assistant. In other words, I would like to remotely change settings under Security -> Mac Filter or Security -> Scheduler Rule.

I've looked at SNMP (preferable) and ZySH through SSH, but is unable to find a way to accomplish what I want. I suppose browser automation through Selenium could solve it, but I'd rather not.

Any hints please?