Kindly log into your Samsung account via a pc and change language and regional settings from the options :) it worked for me.

Also you have failed to understand the issue here.

Suppose if you want wide angle? You can't directly use wide angle without using Instagram mode for Instagram. The insta app doesn't support that. So the only way is to use the Instagram mode if you want to be quick enough. Ain't nobody got time for s...

There's no way to use all 3 camera modes for Instagram stories directly without using the default camera app with the 'Instagram mode'