@mariano Ah yes my apologies, as cited in the doc you linked we do currently support playwright.
To be frank I am not sure why the submit event is not occurring if you specified so in playwright.
I can ask our engineering team and check if this is a known bug and if anyone on our teams know if a workaround that doesn't involving losing the build validation logic.
Will keep you updated on our further releases as we look to streamline the testing automation process.