@oliver.adlerr on paper the specs for Galaxy A71 say:
- Wi-Fi 802.11 a/b/g/n/ac 2.4G+5GHz, VHT80
Maybe it's a regional setting problem. The dashcam might be broadcasting on a channel not approved in your country while your phone should be aware.
PS: I looked it up, it seems like Indonesia has no regulatory hurdles to using channel 36 at VHT80 setting. But it's also unusual for the camera to be broadcasting at VHT80 in 802.11na, but typical for 802.11ac. You might want to use a WiFi analyzer app on your Galaxy A71 to check out what it picks up on the 5GHz bands. Example linked.
WiFi Analyzer (open-source) - Apps on Google Play