The two numbers
Two weeks after neurotoxin. Four weeks after filler. Those are the intervals I hold for intraoral work and for facial drainage, and they are deliberately conservative.
Neurotoxin needs time to bind where your injector placed it. Filler needs time to settle and integrate. Manual work in that window risks moving product you paid for, and neither of us wants that conversation.
What to tell me at booking
The product, the area, and the date. That is enough for me to place the appointment correctly, and if the timing is wrong I will move it rather than work around it.
This is also the order to plan in: massage series first, injectables after. Releasing a clenched masseter can change how much product you need, and that is worth knowing before you buy it.