This looks promising. Client app installs a sub-app https://github.com/ivansandrk/multi-apps/blob/main/explainer.md

Can a PWA have multiple/selectable icons? Like the src in the manifest file gets swapped upon selection or something.

i18n_profile_lemmy_currencyexchangerate_upvote

WorkOutDoors for phone and watch. My favorite feature is being able to offline maps on my watch when I’m somewhere new and it leaves breadcrumbs so you can find your way back. It’s liberating to not have to take your phone everywhere while on vacation and also not get lost.