Note: There may be better ways to do this, but this was my newbie way of getting something working.
I searched and have not seen this so I thought I would post. There may be a better way to do this but this was logical for me. (Sorry if I missed some minor description. This was from memory once I had completed the button.) Andoid 10 on Pixel 3 fully updated as of 5/15/2020.
I am a refugee from Wink and my primary use of Wink was time-based rules and widget buttons to perform tasks on my phone. The Hubitat app does not offer these so I did some tinkering. The first thing I wanted to do was push a button on my phone and lock my front door.
Create a IFTTT.com account
Add the IFTTT App and select what devices should integrate with IFTTT
Search Hubitat in IFTTT.com and Connect the Hubitat. This will prompt for Hubitat login, devices to integrate etc.
Download the IFTTT App on Android and login.
Make your own applets from scratch and add a new applet. Click + by first this. Click on Button Widget then Button Press. Click + by That. Search for Hubitat. Click the tile and select action and device to change.
Long press on your home screen and press widget. Find IFTTT and select the widget you prefer. I chose the 1x1 widget. Press and drag to the home screen. Select the action you defined above.
You now have a button to perform an action similar to the way Wink would run a shortcut via button press. I have not worked on calling scenes or multi-device actions. There is a bit of a lag due to cloud aspect of this occuring.