Can we get the visually similar kanji information in the lessons page? Would be very useful.
I see that there has already been a forum post about this, but it was two years ago and there was no reply from the mods.
And also, what about a function that lets users vote on which kanji are visually similar? Since the implementation of this idea has gone very slow since it was introduced in 2016!
May I suggest you install the Keisei-script, which, as a bonus, means you get listed visually similar kanji that share the main radical during lessons?
The item inspector allows you to get pop-ups for visually similar items and to even change the threshold of what gets listed. This isn’t during lessons though, unlike the Keisei-script, but still a very handy way of learning to distinguish kanji from each other. 
This script will display visually similar data in lessons.