I had this problem too, I upgrade mysql to 8.0.28-2, and then it cann’t work!
I checked the message and then found that: “mysql needs libicu71-7.1.1”.
I tried to use “yay Ss libicu”, but can’t find libicu71…
finally, I use Timeshift to load the older snapshot. and edit the file “pacman.conf” :
# Pacman won’t upgrade packages listed in IgnorePkg and members of IgnoreGroup
IgnorePkg = mysql
IgnorePkg = mysql-clients