After updated on android 10 I have so many problem on my phone like fingerprint not working properly, notification preview not showing and phone getting slow and hang.
Can you please tell the build number of your phone.
Please update to the latest beta version.you are in a older version.
If you click on the link below the latest android 10 beta will start downloading in chrome browser.
Place it in the root directory of your phone storage and restart your phone.
A notification will appear that a update file has been detected. Click on it .
It will start to install the update.