As you know, creating Hybrid Apps is no longer supported in Mendix 9 or Mendix 8.18
Hybrid Apps created with a version <8.18 are still supported in Mendix 9
See: https://www.mendix.com/blog/hybrid-mobile-apps-deprecation-with-mendix-9/ (Nov. 2020)
So the dirty workaround is to create a Hybrid App with a <8.18 version (e.g. 7.23), and upgrade it
to Mendix 9.
I recommend changing the approach and evaluate Mendix Native Mobile or Mendix PWA alternatives depending on your use case.