To check swagger ui version, open dev-tools > goto Console > evaluate (type/select) version > enter Open the object and you will see, like
{swaggerUi: {…}}
swaggerUi
:
{version: '4.10.3', gitRevision: 'g75xxx', gitDirty: true, buildTimestamp: 'Fri, 01 Apr 2022 22:05:32 GMT'}
[[Prototype]]
:
Object