To start off with what that's available...
Huawei App Gallery: Foodpanda, M2U, HLB Connect, Lazada, Shopee, Boost, TnG, Fave, Whatsapp
Petal Search (APK): Grab, Waze, Starbucks (shortcut to website)
App with problems:
1. Foodpanda - Sometimes when you can't add something to the order, you need to keep tapping on the food options (eg: Like after you selected a drink on Tealive, you need to keep tapping on the options back and forth until it's selected then only you can add to order)
2. Grab - Map doesn't work, so you can't pinpoint a location, you only can type it in. Also, you may not see the option for you to show your QR code initially, so you have to look for the latest version and it will appear after some time.
If you wanna transfer your Whatsapp data, go install Phone Clone and all your data will be transferred seamlessly.
Also, some apps that can't be installed from either App Gallery and Petal Search can also be transferred using Phone Clone app, but one thing to note is that once the app developer releases a new update and the app prompts you to do so, you can't do anything, the app will be useless. My case is with Bigpay, doesn't work anymore, and now I'm back to using debit card.
Thanks for the heads-up. Seems like it will be as frustrating when I really start using a phone without GMS, and most of the time spent will be on finding an alternative or getting an app to work. Well, let's see if I finally go for it.
@XperiaDROID what makes you use mate 30 pro as your daily driver? Battery? Camera or performance?