Drywall and concrete walls are two different walls of a building. They are seldom interchanged but there is also a question about what is a drywall in the first place.
A dry wall is a wall composed of plasterboard, wallboard, sheet rock, gypsum board, buster board, custard board, or gypsum pane and all the other boards manufactured. It is set up using either wood frames or wall studs. You can use this kind of wall in your interior partitions but some have also been using these for exterior walls.
Concrete walls are made of concrete blocks masonry and do not need a wall stud. Instead, blocks are piled and bond together using mortar which makes it wet (not dry at all like the drywall).
Drywalls are dry. They do not need wet mortar to be combined but instead, they need nails or a tucker.
The best way to determine if the wall is a drywall or a concrete wall is by knocking. Knock on the wall and if it sounds hollow, it is probably a drywall. When it sounds solid, you have a concrete wall.
Another way is to drill the wall. If your screen goes through, it is concrete, if it stops on a hollow part, it is drywall.
References:
“Drywall.” Wikipedia. Wikimedia Foundation, October 20, 2020. https://en.wikipedia.org/wiki/Drywall.Kishore S. Shenoy 31 August 2020 at 1:40 am – Reply. “Drywall v/s Conventional Brick Wall.” ContractorBhai, October 19, 2016. https://www.contractorbhai.com/drywall-vs-conventional-brick-wall/.