Not many, but they have the basics. Plus Waydroid gets must Android apps working on Linux phones if you feel you must have an Android app. There are also responsive apps that redraw according to the device or screen width. There are definitely more responsive apps on Linux phones. See the Maui Kit project (KDE) Signal and Telegram are responsive and work on Linux phones. Lollypop is a good responsive music app that works well on phone and desktop. You log into "Online Accounts" on your Linux phone, just like desktop, and install Evolution desktop onto your phone, and that gets all the contacts, calendar and tasks working and syncing. You don't ever have to open Evolution after it's set up. There are movie apps for all of those. That was the state of Linux phones running the Phosh Mobile OS (Debian) 3 years ago. They may have everything working without Evolution at this point.

Also, how many desktop apps does Android have for use with phone convergence functionality?