I'm converting a 6-speed derailer (folding bike) to a 7-speed Nexus IGH (SG-7C18). One thing I'm not clear about is: do IGHs work with any typical indexed shifter?

My Nexus came with a twist grip which is fine for my usage. I'm just asking because I'm confused on this topic. I looked at Sturmey Archer, SRAM, etc. before choosing the Nexus. It seemed like all the manufacturers listed shifters specifically for their IGH hubs. That caused me to think IGH shifters are different. But, the Nexus twist shifter feels like it's indexed the same as any twist shifter.

Thanks.