Hub Seal Parts

Parts diagrams show a two piece hub seal. A nut with flanges for the outer tub and a plastic seal nut.
My washer has a single piece seal nut.
Do I need to replace the one piece with a new two piece one. Can’t find any info on this and parts diagrams from several places are confusing.
Most of the parts places show the hub seal kit as unavailable.

Are you talking about this part?

Whirlpool W10219156 Tub Seal - AppliancePartsPros.com

Amazon seems to have them.
-tub-seal-.jpg (60.3 KB)