They finally found the culprit of the ticking noise. I had to get the service manager involved, and he was able to dive deeper with a technician and finally replicate the noise from the B-pillar. Annoying part about this was that I called Lexus to open a case and they told me to kick rocks; they can't do anything about it. I had to push the service manager to get something going. They, at the dealership, internally opened something with corporate/Japan (their explanation was that someone from Japan would advise on how to fix it). Finally got the call earlier this week and they found the spot welds in the b pillar was not at spec. So, this whole week, it has been at the body shop getting the spot welds re-welded. I will post technician notes and service notes when I get the car back.
I must say this whole process has been annoying because of the previous rudeness and gaslighting of the service advisors saying they cannot hear anything. But, after over a year later I think this issue can be resolved. Toyota has a serious QC issue with their spot welds, just based on things in here with the C pillar, B pillar, Roof, etc and the LC forums. Other models like Camry and corolla have had spot weld issues as as well. They need to TSB this shit or recall it.