I'm not sure how you were "given" any NewBlueFX with PD365, as Cyberlink terminated their licensing agreement with NBFX a couple years ago. If you had earlier versions of PD and still have the NBFX packs installed, they should work fine in PD365/21.
There are still many packs that are compatible with PD available from NBFX, and you can find all their products on this
page. The ones with this logo are legacy products, and to my knowledge all should work directly in PD:
You may want to look at this fairly lengthy
discussion for more details.
I'm actually having a similar issue with these legacy packs on my Surface Book 3, which i just did a clean Win 11 install on. I'm not able to activate any of these packs, even though I purchased them many years ago - before CL started including them. I'm using the proper license code but keep getting a "unknown error."
I'll post back once I hear from NBFX tech support, but I'm not sure if that's relevant to you unless you also had licenses directly from NBFX