Hope you're doing great.
In my ICAO to TC ATPL-A conversion process, I have come to a rather odd situation here and I probably need some wisdom

I have already did a Group 1 Multi-engine IFR flight test a couple of months ago for the purpose of ATPL-A issuance after doing all the 3 necessary written exams. An agent contacted me today and told me that I would need "another" checkride for a "Multi-engine Class Rating" under 428 schedule 7 which is totally separate from the Multi-IFR flight test I have already performed (428 schedule 8 ).
Is this true? I thought I would only need to comply with 421.34 ATPL issuance and this guy wants me to get a multi-engine class rating on top of that.
I'm kinda stuck here, and would greatly appreciate your help on this!
Kindest and wamrest,