This page says no:

"Is it possible to break out of an in-app browser?

Native apps can allow users to break out of their in-app browsers (although many deliberately choose not to). However, PWAs lack this flexibility. As of now, there’s no way to force a link to open in Safari or Chrome rather than the PWA's in-app browser."

progressier.com/pwa-capabiliti

*Why* on earth is this the default, unchangeable PWA behaviour?! Has anyone ever preferred the stunted in-app browsers?

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