I know that AllureSeverityAttribute can be used by adding a tag to SpecFlow Scenario like @blocker, but it also requires special allureConfig like:
"specflow": {
"stepArguments": {
"convertToParameters": "true",
"paramNameRegex": "",
"paramValueRegex": ""
},
"grouping": {
"suites": {
"parentSuite": "^parentSuite:?(.+)",
"suite": "^suite:?(.+)",
"subSuite": "^subSuite:?(.+)"
},
"behaviors": {
"epic": "^epic:?(.+)",
"story": "^story:(.+)"
}
},
"labels": {
"owner": "^author:?(.+)",
"severity": "^(normal|blocker|critical|minor|trivial)"
},
"links": {
"tms": "^story:(.+)",
"issue": "^issue:(.+)",
"link": "^link:(.+)"
}