You don’t necessarily need a compound but bear in mind it does most of the work. With some compounds you can even use paper or wood as a stropping substrate instead of leather.
As with sharpening using hard flat materials, stropping requires some practice and if you press too hard you can dull the edge instead of make it sharper.
If you’re using a proper (expensive) leather strop then a purpose made stropping compound would be best.
If, like me, you’re using an old leather belt then I use an abrasive metal cleaner, Solvol Autosol, Peek, Brasso, any of the tube or liquid cleaner/polishes, they’re like stropping compound but sloppier. Just a little at first, with leather you can always put a bit more on but it’s difficult to remove. Don’t worry if is dries out it’s still abrasive.
Even corrugated cardboard can be used, it’s abrasive as well, but use it dry.
A partially serrated blade knife near to the ganzo g704… Perhaps the enlan el01 partially serrated, gray or black but with liner lock.
Mmm the ganzo g715 too…