There are conditional activities and have you looked at the Lesson module docs.
Courses and course formats
Conditonal Release: viewing last page in a sequence?
གྲོས་བསྟུན་འདི་བསྡམས་ཡོདཔ་ལས་ ལན་གསལ་བརྐྱབ་མི་ཚུགས་
There are conditional activities and have you looked at the Lesson module docs.