Hoi
I had this with my iPhone 6s, so much that I eventually gave up and went for the best PET protector in the spigen plastic.
However with the iPhone 7, iPhone 7+ iPhone 8 (Not all mine!) Normal Glass protectors fit fine.
So IPHONE SE 2020 product red ......
Same issues as iPhone 6s, Halo time!
Looked about including this review and found that OMOTON 4 pack give no Halo effect .... YES I thought. £6.29 on Amazon.
Then I turned on the mobile and the white screen refracted on the edge of the protector and gave a prism or rainbow effect!!
NOOOOO! We nearly had it made. Of course Dark mode helps massively, but we don't always have this, such as camera and other non dark apps.
So I sent them back.
Where now? I simply can't buy lots of screen protectors to try and send back. IS there a list anywhere?
I did look at full protectors with Black edges but these aren't always case friendly and lift the protector off the screen.
For something so simple why do these companies not test these to see the issues? would 1/2mm on the OMOTON version stopped the rainbow or is it the curved 2.5D edge?
Like yourself I am lost for now.
Went to Poundland and bought a £1 glass 'protect and preserve'. yes its cheap, yes it still has a halo, but its fine until this issue has been resolved.
Cheers