Meaning of the triangular mark on the post and submitted works.

After all, if people cannot view it, it does not matter whether it is mosaicked or marked with a △ or any other notation, as before. It is meaningless.

Many requests have been made in the past, but that is because
The modification to be able to post without any problem as before.
Even if the standard has changed due to a rule change, etc.
The reason for the change should be clearly stated.
Add an objection function.
If the standard has changed due to a rule change, etc., the reason for the change should be clearly stated, and an objection function should be added.

You are missing the point. What on earth are they thinking?
You may think you are doing your job, but in reality you are doing nothing.