If you are new to filler, the timing question comes up early. When does the result actually settle?
The waiting period is about two weeks
An article at health.clevelandclinic.org says: "The full effect of fillers is noticeable after about two weeks."
That sentence covers fillers in general, not lips alone. Your own timeline can differ, so ask your clinician what to expect for your lips.
The cheap, simple part
Waiting is free. Use the two weeks to notice how things look rather than judging on day one. You can read the full source, Cleveland Clinic's tear trough filler article, for the setting that sentence comes from. The FDA's dermal filler page and the ASDS injectables page add general background.
What to leave to a clinician
Do not try to fix or reshape a result at home. Whether something needs attention is a judgment for a licensed clinician who can see it in person.
If you are unsure about what you see, ask your clinician. It is a reasonable question.