Update (May 2024): Recently, Postman seems to have added Insomnia import natively - https://learning.postman.com/docs/getting-started/importing-and-exporting/importing-from-insomnia/. Though I haven't tested it yet. Nevertheless, this plugin probably won't be needed anymore.

• Adds 'Export as Postman Collection' option in Collection (Workspace) menu
• Requests can be selected via regex or a csv of request ids (the filters don't work at folder levels currently)
• See todo section in main.js for limitations and enhancement plans. (Also have some todos listed here, some of which were done as part of the the rejected PR but need to be added to the plugin also.)
• Based on https://github.com/Vyoam/InsomniaToPostmanFormat

https://insomnia.rest/plugins/insomnia-plugin-postman-export
https://www.npmjs.com/package/insomnia-plugin-postman-export

Note: request id can be copied from the settings dialog of the request.

For reference, Insomnia plugin locations:

MacOS: ~/Library/Application Support/Insomnia/plugins/
Windows: %APPDATA%\Insomnia\plugins\
Linux: $XDG_CONFIG_HOME/Insomnia/plugins/ or ~/.config/Insomnia/plugins/
Ref.: https://docs.insomnia.rest/insomnia/introduction-to-plugins#plugin-file-location