[Q] Will resetting the flash counter wipe all the partitions in phone? topic

Because I'll be needing to take my phone to service center, I'd like to know if resetting the flash counter using Odin or Triangle Away or something else would wipe all the partitions in my phone??

If yes, will I need to download the stock ROM again in Meta-mode??

If no, what all partitions does it wipe?? Or doesn't it wipe at all??

Do I need bootloader unlocked??

Thanks :)