Board Thread:Theories and Speculation/@comment-45444155-20200806213256/@comment-1512913-20200808181311

Yes and no. There are ways to use Senjutsu chakra without having to be in Sage Mode and being Sage in general, just like there are ways to use Tailed Beast chakra without the need to be a jinchuuriki.

Curse Mark users use Senjutsu chakra, but it's pseudo-Sage Mode at best.