First off, congrats on the new watch.
Second, you need to share some pictures!
Third, to your question. For me, with one exception (the straps for my Vagbondage), everything is OEM Journe sourced from the Boutiques. I’ve found I really like the double sided straps, and the padding (minimal tapering to none) works really well for my watches and wrist.
Many others will have also has straps made by Jean Rousseau, ABP and others.