We all know by now that Apple removed the iconic startup chime from the MacBook Pro way back in 2016. Well.... It's back! Someone found a nvram command to enable the chime!
To be honest, I have been rebooting multiple MacBook Pro's for the last hour.
The sound for 2016 & 2017 T1's and 2018 & 2019 T2's is different.
The 2016/17 is the same exact sound as the macbook air or the 12" macbook.
The 2018/19 sounds deeper but might have some slight static.
If you tried this and it didn't work, make sure your sound is not muted. That usually fixes it for anyone having issues. Also make sure you type the command in exactly the same, as it's case sensitive.