OK I’ll give it a try.
My question was similar - when leaving the sanctuary after the procession on Holy Thursday, should one genuflect to the empty tabernacle?
No. Not to the empty tabernacle, exactly because it is empty.
However, if you pass the tabernacle that does have the Blessed Sacrament (what we call the place of repose, or tabernacle of repose) then yes. This would be the “temporary tabernacle” to put it into plain English.
I assume the answer is the same as for entering the sanctuary on Good Friday. But I’m still confused as to what the answer is.
It would be the same thing for Good Friday, with regard to the tabernacles, as above.
Entering on Good Friday will be the same. However, when leaving on Good Friday, the Crucifix will be solemnly displayed (when you enter it will still be covered in violet from Thursday evening), and on this particular day we do genuflect to the Crucifix.
Is that confusing enough?
If it’s still confusing, don’t worry. Lifelong Catholics get confused this week. Even priests I made a big one tonight (and no, my lips [and my keyboard] are sealed).
Since you’re asking about vocabulary, you won’t be entering the “sanctuary” on Good Friday, you’ll be entering the nave (or just “the church”). The sanctuary is only the place within the church where the altar is located.