I lived in a country that didn't have reels until the end of last year, and now I live in a country with access to reels, and I would like to have the option, however, Instagram has given me all other 'new features' (such as the Music feature) but I don't have reels. And I suspect this is because it still shows my country based in Asia as you can see here: https://imgur.com/a/vBHnOl6
I've tried redownloading the app, I'm on a European sim/wifi connection, I changed the language on my phone, I changed the language and location of the business the page is connected to, I googled for hours.. but nothing changes within the app.
I have three possible solutions to your problem:
1. Is your Instagram connected with your Facebook account ? If so, you can try changing the location from the settings of your Facebook account.
2. Have you tried changing the phone number in your Instagram settings ?
3. Have you tried changing manually the location of your phone ?