As someone that used to write 2D games with things like phaserjs, sdl and even directx7, I always regret I never tried Löve2d. I think Android and iOS packaging was also supported. Is this still the case? What if one wants to integrate IAP?

Pretty sure there is still app packaging documented somewhere. There is also, at least for Android, an official Löve2D Launcher app that can open any love-file saved to the phone and execute it. I use that all the time.

The Launcher is available also for old Android versions, which means that old obsolete Android devices (I have some tablets and phones) can be used for whatever it can be fun to still write some GUI for on some spare touchscreen device.