You guys should check https://www.sunscreentester.com/the-results/

Methodology is not perfect, but indicates that;
1. Asian suncreens are weaker that Western ones on average. Especially Japanese ones. In vitro at least. And obviously people have been using some of these poor-reviewed ones just fine, no burning, etc. Perhaps interaction with sweat and sun activates the UV filter somehow. But surely it gives me a peace of mind that a lot of brands just simply block the UV without requiring some weird shit to happen first on your skin.
2. Physical suncreen can protect from UVA just fine. Physical filters don't automatically mean bad UVA protection.