Workaround I'm currently using:
1 Open Shortcuts app on the phone.
2 Click the Shortcuts on the top left corner
3 Select "Apple Watch"
4 Click the + on the top right corner
5 Click "Add Action"
6 Search for "Open App"
7 Click on the App next to Open and select the App you would like to auto launch on the watch
8 Rename and Choose Icon from the shortcut name found on top of the screen
9 Click Done on top right corner
Repeat the steps 4-9 for the all the other apps you wish to add
Add the Shortcut Complication on your watch face or add each Shortcut in the new Widget.
I prefer adding the Shortcut as a Complication, launching the Shortcut from the new Widget requires to click the Run as an extra step.
You can also add your smart home automation in the Shortcuts
Hope it helps.