Greg Barbosa, writing for 9to5Mac:

Twitter’s latest iOS update, released today, now includes iPad-compatible keyboard shortcuts. Users with paired Bluetooth keyboards or Smart Keyboards will now be able to use their keyboards to create new tweets, or move between tabs.

And:

Holding down the command key on the keyboard on devices running iOS 9 or higher shows a small dialog indicating which keyboard shortcuts are available to use.

Good to know.