I look upon the ADB as a wet behind the ears neophyte MBA resumé enhancement project, commonplace in many government departments.
When I last renewed late '23, the process was more cumbersome than passport renewal and it took several months, including intervention from the RAMO office,. before I received a sticker for my recent medical.
They had "supply chain" difficulties.
The hopefully good news is that there's a TC Air app announced that is touted to significantly simplify the renewal. I'll check it out in 2033.