Hidizs S9 PRO Balanced & Single-Ended Mini HiFi DAC & AMP | Hidizs
Amazon.com: Samsung Galaxy Buds FE True Wireless Bluetooth Earbuds, Comfort and Secure in Ear Fit, Wing-Tip Design, Auto Switch Audio, Touch Control, Built-in Voice Assistant, US Version, Graphite : Electronics
Yes, the Samsung Galaxy S9 has a headphone jack - The Verge
Useful audio settings on the Galaxy phone including Separate app sound