Fix #1: Use Facebook Mobile Site (BEST SOLUTION)
Facebook Reels are shown prominently in Facebook mobile apps. But they are still not present on the FB Mobile Site.
So open any browser on your iPhone, iPad or Android device. Go to https://m.facebook.com/ which is the mobile version of Facebook website.
As you login to your Facebook account on the Facebook Mobile Site, you will see that there is no Reels tab on the Facebook Feed.
To easily use the Facebook Mobile Site like an App, tap on the three dots to the top right of browser.
Tap on "Add to Home screen".
In the next dialog menu titled "Add to Home screen", tap on "Add".
Now you can easily use Facebook Mobile Site from your Phone Homescreen using this Icon.
In this way, you can enjoy using Facebook on your smartphones or tablets with Facebook Mobile Site, and also avoid seeing the Reels feature.