Google has gone on record in saying that they plan to implement more EV driving experiences into Google Maps. At this point I really don't personally see any benefits to having an app versus just having Google Maps filter. And with the latest update (credit card icon) you can filter by brand. You can also filter by DC fast (50kW+) though I wish that was more granular, like a slider bar (ex: PlugShare's app).
At the end of the day, the only real benefit of the EA app in the car would be the ability to start a charge upon arrival, avoiding having to use your phone/app or RFID/NFC cards. This definitely has an advantage, but I suspect we'll see the ISO-standard plug-and-charge adopted faster than an app be written for a very small number of vehicles. Sales of the XC40 Recharge (and Polestar 2) are limited, so the authors of such an app have a rather small audience, to justify the time.
FWIW, if you have an Apple Watch (or similar device), the RFID reader on the EA stations works GREAT. I've managed to plug in, double click the button on my watch, swipe Touchless to the tower, and get back in my car-- watching the charge start within < 60 seconds from arrival tot he tower. While this isn't quite Tesla-levels of speed, it is adequate, and the only thing I had to touch was the charging handle. (we travel with cleaning/disinfectant wipes for our longer trips, for those who want to avoid germs)
PS: if you are taking a trip, and can use just EA chargers, spend the $4/mo for the lower rates-- you'll more than pay for it by the 2nd charging stop typically. If you are in the USA and can use just EA chargers, they tend to work better (150kW always, if your temp/SOC allows) whereas ChargePoint/etc are normally 50kW max (with fewer exceptions, at least in the midwest; YRMV).