The vast majority of gaming memory is designed to work with EXPO (or XMP, for Intel). They're supposed to work fine permanently at whatever JEDEC speed they boot up at, which in most cases they do, but it has happened that even at stock they need adjustments (like to increase the dram voltage).Some of the RAM i have looked at is already EXPO, still not sure about this? If i use EXPO ram, can i run it without it or do i have to change settings in the bios to access EXPO?
This is an example of a datasheet that tells you what speed it boots at:
FACTORY TIMING PARAMETERS
- Default (JEDEC): DDR5-4800 CL40-39-39 @1.1V
- XMP Profile #1: DDR5-5600 CL40-40-40 @1.25V
- XMP Profile #2: DDR5-5200 CL40-40-40 @1.25V
- XMP Profile #3: DDR5-4800 CL38-38-38 @1.1V
Here's a Corsair one:
(JEDEC)
SPD Latency: 40-40-40-77
SPD Speed: 4800MT/s
SPD Voltage: 1.1V
(EXPO)
Performance Profile: AMD EXPO
Tested Speed: 5600 MT/s
Tested Voltage: 1.25V

VENGEANCE® 32GB (2x16GB) DDR5 DRAM 5600MT/s C36 AMD EXPO Memory Kit
Deliver the higher frequencies and greater capacities of DDR5 RAM technology in a high-quality, compact DDR5 memory module that suits your AMD® Ryzen™ AM5 system.

If you 100% want to run at stock, I'd be more inclined to buy memory intended for doing it, but it's your call (and if you want RGB, then I think you really have no choice but to buy gaming memory, unless there's some I missed).
The main advantage you'd have of buying gaming memory is that if one day you need to have the extra speed, you potentially just have one click in the BIOS (to enable EXPO) to go from 4800 to 6000 (or whatever it is that you buy).