WiFi scanning itself does require location permissions, but I have no idea why a DNS app needs to also scan WiFi. Also, a closed-source app like that just doesn't inspire confidence. Consider using Rethink DNS from F-Droid.
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I guesa location might be needed to scan WiFi, stay still, if the app is unknown and closed source it's still better to avoid it
The only thing I can think of is geolocation for CDNs. Basically to find the geographically closest server based on your location.
1000 downloads, no reviews, and just someone’s name
Regarding privacy, security, and anonymity, your own common sense will take you a long way.
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quad9 has their own app ☞ https://f-droid.org/packages/com.quad9.aegis/
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