There are two different "certificates"
A Certificate of Residence (COR) is needed for things such as a TDL, open bank account etc.
There is a TM18 form which is used by folk that have Permanent Residency " status.
Thinking the appointment pic you posted is for the latter
Attached thread mentions the two..
https://aseannow.com/topic/1308730-certificate-of-residence-documents/
As posted earlier in thread, if someone can wait till 90 report window is open the io will process the TM47 photocopy it on the spot and process your COR.....
"Added tip for CW...if your 90 day report window is open you can make an appointment for report and the same desk will process for the report and also COR.
Show both applications to far right que counter
There are no appointments for COR"