I've yet to try Super Duolingo. But I've also been tapering off my usage as they keep forcing to use the word bank instead of keyboard at an increasing rate. I've no desire to use the word bank, they seem to have no desire to let me use the keyboard. Unless that's buried in one of the premium options I see the writing on the wall.
Interesting, I am a Super Duolingo subscriber but I don't think that's one of the features. Anywhere I'm inputting a sentence I think I get the keyboard option, maybe I'm misremembering, but I do a lot of typing on my Japanese keyboard when I study.
They were clearly doing some A/B testing a while back based on sporadic complaints on r/duolingo. At some point I noticed it had solidified. The current setup is if the drill is target language to host language, you'll always get word bank. If it's host language to target language it'll push you towards word bank but you have a subtle thing to click on that brings back the keyboard. Sometimes it's called "make harder" or sometimes "use keyboard" (vs "make easier" and "use word bank")
Try supplementing Duolingo with Anki / Ankidroid. Every word that I learn in Duolingo, I put into Anki. I do all my reviews in Ankidroid on a small E-Ink device but it's actually designed for phones.
You can configure Ankidroid to require you to spell the words properly.
