Propane regulators are available adjustable in different ranges, can use manifold / splitters if different appliances have different needs.
When in doubt ask a pro.
There are propane bottle - to butane appliance adapters available on eBay and elsewhere. The quality stuff is from Korea, "G-WORKS", pretty pricey, but includes the pressure adjustment feature.
USians pro's won't have a clue about the adapters though.
Terminology for the various fixtures, valve connections : male vs female of course
Butane thin and tall like Iwatani: CP / P220/ DOT2P / CP250 canisters (~ 5/32", 4mm)
Butane wide and squat (usually) standard 7/16 (11mm) UNEF threaded, Lindal Valve, aka "screw style" canisters, EN417 (/ EN521?)
Propane, standard BBQ & other bottles, usually vertical use, vapor valve: Type 1 QCC ACME + POL thread since OPDs were required, used to be POL only
Propane Coleman style 1#: 1"-20
To learn more, google the term + the gas, e.g.
https://www.google.com/search?q=POL+thread+propane
And add the other side gas + thread type + "adapter" to search for appropriate fittings.