The latter you've mentioned is correct, this is for Wii U only. To make matters worse, this is not available on Nintendo Switch any more.
However, I guess that Smileboom is planning to develop new BASIC interpreter like SmileBASIC for Nintendo Switch.
Of course it is not certain, but Smileboom often develops interesting software for any game console and PC.
Let's wait expectantly.
7そうだね プレイ済み