Considering the size of a p09, owb is going to be tough to conceal, especially the butt of the grip. No matter how tightly you pull the slide into your side, that butt is going to be popping away unless you can put some twist on the whole gun. IWB this can be done with the new little kick arms that push against the belt behind the trigger guard to rotate the butt toward you. OWB you probably need to look at a rigid kydex like comp tac flatline. You need some kind of envelope holster with belt attachment both fore and aft to get that twisting to conceal the butt. This is going to make the draw a bit difficult too.
Dsg has this
DSG Arms OWB HR Holster CZ P09 (E2 Tan RH)
https://www.amazon.com/dp/B07BS3DD49/ref=cm_sw_r_cp_apa_i_.R6fCbRJ3W1CJYou might consider reassembling the belt clips to the outside and wearing the holster between the belt and pants. Sometimes this helps keep it sucked in tighter if you have a slim build
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