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Yes indeed it is super grainy, I think it has to do with the film being super old probably bad storage.
I always let my rolls developed at the same photoshop in Budapest. You can check them out here:

https://cafeanalog.hu/

Drop a picture of your 6x9 please, would love to see it.
!LUV

Hungarian is an interesting language. At least the important words are clear 😉 Probably the grain is from the storage. I don’t know what chemicals are usually used at a mass scale. I process my rolls at home. I’ll share a couple of 6x9 frames later.