One of my three devices did same. On first run it get 22621.290 and when it was completed next run of W.U. give Enablement Package to 22622.290.
As said in blog:
We realize that Insiders in the Beta Channel will want to choose which update they get. Insiders who land in the group with new features turned off by default (Build 22621.xxxx) can check for updates and choose to install the update that will have features rolling out (Build 22622.xxx).
Typical MS confusion. 🤣
At least this time it matches.
Both machines at 22622 have Tabs and navigation pane update.