I played for a while I have opinions but no time to wrote them now.
It's HRC mall event out of my total 6 playthroughs I had this event like 2 times I think it can be launched on sunday by getting message from Jasmin early game I dunno what trigger is and can't check it now but I think it depends on options you pick up on first meetings of the club.
Not a fan considering that event has chance of not launching or you can simply do it before coming across Mya which would block whole progress as well...
Down the line Mya also needs track field event
friendship 30 or 40 I think so you need to rush her or have it open for longer cause once you go cheerleader route it's closed for you and track with all events is now really stacked.
And there's also S&M and coffe event with her so be sure to be hired on both.
I genuinely think that her HRC event should be normal mall event or
make that event 100 % like second / third week like Jasmin friendship 30 or something and her track event could be park event or something as I said track is already stacked with bunch of events and you get one per week at the moment Mya route is kinda a mess cause it's reallly easy to get locked..
Edit: I checked it