The terms scope/sequence go hand-in-hand in education and coaching...
scope
The breadth and depth of content to be covered in a curriculum at any one time (e.g. week, term, year, over a student’s school life). All that you do in a given period.
sequence
The order in which content is presented to learners over time. The order in which you do it.
Together a scope and sequence of learning bring order to the delivery of content, supporting the maximizing of student learning and offering sustained opportunities for learning. Without a considered scope and sequence there is the risk of ad hoc content delivery and the missing of significant learning.
In terms of gymnastics the scope/sequence depend on the event and level of the gymnast. In a nutshell on floor (tumbling), a gymnast first learns a handstand, then a cartwheel, round off, a backbend, then a backbend kick over, back walk over, front walk over, back/front limbers, back hand spring, round off back handspring, etc... This takes YEARS for many gymnasts to master.
As far as sequencing through the levels, you could look at the tumbling skills needed, for example, on floor for USAG (assuming J.O) from beginning to end. Taking into account your gymnasts level, that should give you a clue as to what the sequencing should look like during practice on floor for the tumbling portion. The dance, jumps, and leaps are all sequenced separately.