How can I search/filter for calendar invites in OWA?

I want to make an inbox rule in Outlook on the web to categorize meeting invites/updates/cancellations, but can't find the search or rule syntax.

The Microsoft rules documentation doesn't have any details about specific filter criteria.

I found this answer about item type searches but it doesn't work in OWA. Searching messageclass:IPM.Note or [Message Class]:IPM.Note just finds emails with text "IPM".

This answer using the rules wizard uses a specific macOS GUI option that OWA doesn't have.

This university helppage uses an email header search X-MS-Exchange-Inbox-Rules-Loop: [email protected] which led me to a possible solution: creating an email rule with the header search X-MS-Exchange-Calendar, which in my inbox I observe all invites having. It seems to work... but it also seems hacky.

Searching for message body text inviting you to a scheduled Zoom meeting has a pretty good hit rate as our company uses Zoom exclusively, but your mileage may vary. (This has the added effect of surfacing invitations that have been forwarded as plain emails.)

Create a email rule, with option Message Include > Type > Invitation.