For shits and giggles lets look at Bluewallet's connections and try and see what each of them are used for...

Busgsnag is for real user and error monitoring. I suppose this is a diagnostics service for analytics.

bitcoin.lukechilds.co looks to be Luke's electrum server, which is set by default.

Bitstamp is a crypto exchange that is pricing info

More electrum servers?:

mainnet.foundationdevices.com

amazonaws.com

electrum1.bluewallet.io

ssd.jhoenicke.de