Here are troubleshooting steps you can follow:
1. Ensure that you have the latest version of the NTFS for Mac software installed. Visit the official websites of Paragon and iBoysoft to check for updates compatible with Big Sur.
2. It is strongly recommended to uninstall Paragon software and then try to run the iBoysoft NTFS for Mac once again for full access to read and write your NTFS drive and avoid incompatibility between the two software, remember to download the right version of the iBoysoft NTFS for Mac.
3. Verify that the NTFS software you're using explicitly supports macOS Big Sur. Some software may require updates or patches to function properly with the latest macOS versions.
4. Check the permissions settings for the external NTFS drives Right-click on the drive icon, select "Get Info," and make sure your user account has the necessary permissions to access the drive.
5. Try Different USB ports or cables because sometimes, the issue might be related to a faulty USB port/cable.
6. Reset the System Management Controller (SMC) and Non-Volatile Random-Access Memory (NVRAM) on your MacBook Pro. Instructions for resetting can be found on Apple's support website.
7. If all the above steps fail, consider contacting technical support for the NTFS software you're using.
8. By following these steps, try to mount your external NTFS drives again. If the problem persists, don't hesitate to seek further assistance from technical support or Apple's support.
You can also refer to NTFS External Drives Not Mounting/Working on Mac
