Flashed stock firmware S8+, some android apps are still showing as rooted phone??

Hi, not sure if this has been posted before or if I have posted in the wrong section so apologies if I may have.

Okay so I rooted my s8+ a few months ago and I decided yesterday that I want to unroot so I flashed a stock firmware. I found on updato, the version which I believed would be mine (SM-G955F, XEU version) as I purchased my s8+ in the UK unlocked. Anyway it all flashed fine but my device recognises the firmware as official but many apps (natwest, barclaycard, android pay Samsung pay) still say that it is rooted, unlocked bootloader etc. I disabled OEM but there is still no effect. Is there a way I can make my device recognise itself as genuine and not rooted etc without having to actually root it as some apps still do not work after rooting with magisk and twrp even though android pay does? Also now there are apps which I can not download from the app store such as netflix. PLEASE HELLP!! (I know I can download the apks but I want my phone to be as it was again) Its driving me insane, I just want everything back to normal as if I just purchased my s8+ brand new and have no modifications. (this is the last time I'm rooting a phone)

THANK YOU VERY MUCH IF YOU HAVE A SOLUTION!!

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