I'm no expert, but there are different "standards of care" that any licensed professional should be following according to your relationship.
I guess "Fiduciary" means he/she can't suddenly sink all your investments into a construction company his brother-in-law owns one day and then charge you 50% transaction fees:
Fiduciary vs. Suitability Standard of Care Comparison Table
"[Being a fiduciary] means that you have a fundamental obligation to act in the best interests of your clients and to provide . . . advice in your clients’ best interests."
(not to parf but I thought the prez might be trying to get rid of those definitions. I don't know more.)
Also look into no-load funds. Depending.
1% per year paid for your child's
https://www.irs.gov/newsroom/529-plans-questions-and-answers eventually equals about 20% loss after a couple decades when they(you) are ready to pay down the school debt.
https://www.thebalance.com/no-load-vs-load-funds-2466715