So, I managed to resolve it. Turns out it was my Logitech headset just not playing ball with Roon. I accidentally set my speakers to default and was surprised to hear audio come out of them while testing.
Guess I’ll stop using these now and look for an alternative.
Think it has something to do with this? Roon skips all songs and won't play [Solved - Driver issue, solved by enabling advanced setting on device that misreport capabilities] - #27 by Roman_Pacheco1