Android custom export template not optimizing .aab output
I am new to Godot and trying to use custom android template to publish my game for android in .aab format.
I want to optimize my game size hence I have created custom export template which is working when I am exporting in .apk format, but when I am trying to use the custom template for .aab export it is not optimizing the output and the file size is not optimize.
game.apk (39mb) ->(used export template) - game.apk(24mb)
game.aab(34mb) ->(used export template) - game.aab(34mb) [Not expected]
Godot3.3.2 - Mono - C#
Please help me if I am missing any thing in the process.
Thanks in advance.