Accepted answer
Answering this needs the jurisdiction, because prescribing rules and what may be supplied remotely differ substantially.
Baseline investigations before starting and a defined monitoring schedule afterwards are what distinguish a clinical service from a questionnaire. Ask what is measured and when.
Ask whether records are shared with your usual clinician, and arrange it if they are not. Fragmented records are the mechanism by which a manageable problem becomes a serious one.
Whether a dispensed product is approved or compounded is a documented fact that a service can state, and reluctance to state it is itself informative.
Requirements differ by jurisdiction and a service lawful in one may not be in another.
Ask whether the product is approved or compounded, and by whom. Do not accept a vague answer.