My device is rooted

[Nubia]

I discover my device is rooted with masgisk anytime I try to Uninstalled I loos everything and it's crashing my note 10 plus 

[salmanul]

If you have tried performing a factory reset on your Note 10 Plus and the issues persist, the next step is to flash the stock firmware. However, flashing firmware requires technical expertise, so it is recommended to seek help from an authorized service center or contact official support for assistance. They will guide you through the process and ensure that it is done correctly.

[aramis]

Authorized service center as i know dont deal with cases of rooted device. They will surely not touch the phone.

[salmanul]

May be the expert available in locally or do it yourself

[aramis]

you're right

[mZoOnY]

1 : do a hard reset through recovery
That's by turn off your phone >plug-in in type c cable or headset
Press both vol+ and power button for a few seconds

2: backup everything on pc using smart switch software

If any update available shows up do it !!

If not only back up and download the official firmware here : https://www.sammobile.com/samsung/galaxy-note-10-plus/firmware/#SM-N975F

You can also see how to use odin tutorial on the same page

[mZoOnY]

Remember to use your own phone model

[mZoOnY]

For more information check the Uninstallation part here

https://topjohnwu.github.io/Magisk/install.html#magisk-in-recovery