Hello!
I've got my second interview for a SB tomorrow and was wondering if you guys sent an individual thank you email to each panel person immediately after the interview?

My first panel interview was done over WhatsApp group chat and all the communication with the panel was done through there so I sent a Thank You message in there afterwards.

This is my first time getting through to the second round, interviewing with higher-level people. Should I ask them for their emails, or ask the HR hiring manager, or just check on the Singapore Government Directory?

Just want to see what's the best action to take here because I want this job and I'm nervous.