If those are the extent of complaints, then I think Safari's doing just fine. That's nothing like the next IE, and shows that PWA still have their own problems regardless of Apple.
IE had a lot of browser features which officially were there but in practice didn't fully work.
I had issues with forms, zIndex, SVGs, backgrounds and localStorage with Safari. All of which I consider basic browser features which should always work.
Of course it's not as bad as IE but Safari is clearly lagging very far behind Chrome and Firefox