This plugin depends on SCM API 2.0 and friends, which is hidden from the update center.
Net user experience is the bitbucket branch source plugin won't load and so you see these jobs missing.
There are dependency errors loading some plugins:
Bitbucket Branch Source Plugin v2.0.1
Jenkins Mercurial plugin v1.57 is older than required. To fix, install v1.58 or later.
SCM API Plugin v1.3 is older than required. To fix, install v2.0.2-beta-1 or later.