I use this small magnetic mount. Nothing fancy, no wiring, and blends in ok to the dash.
https://www.amazon.com/dp/B07SMBHRKN?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
EDIT: Well the good news is that it's the butt-fan making the noise. The bad news is that it's summer in Texas and the extra little circulation is very welcome in this heat. One of my kid's treasures probably got shoved up under the seat and is...