Netherite bee can't pollinate wither rose without getting wither effect. then it dies.

That’s an easy fix. I’ll fix it for the default shipped options. But you can go into the bee jsons and set the netherite bee to ”isWither”: true

Sorry “witherBee”: true

In resourcefulbees-1.16.3-0.5.5b.jar this is still an issue. Would changing the
"traits": ["nether"],
to
"traits": ["nether", "wither"]
correct this?

Yes changing it to that would be correct