Thanks for the explanation.
I was downloading some scanned in documents that were in zipped multiple TIFF form. Sure I could convert them (or view them) on a PC but I only had my phone handy. Presumably there are no Android image converters that handle TIFF either.
I guess there are online sites that would convert images but I didn’t fancy uploading the files to them (I have slow upload speed) and I don’t like to rely on the cloud anyway.
So yeah, it would be good to be able to deal with TIFFs natively on Android.