I'm not familiar with pg, but the choice of case sensitivity is a fundamental property of collations in other DBMSes like MSSQL. Web search does make it look li

I'm not familiar with pg, but the choice of case sensitivity is a fundamental property of collations in other DBMSes like MSSQL. Web search does make it look like pg only got case-insenstivity-via-collation in v12 (2019), and also requires you to make your own collation with case-insensitivity since it doesn't have any built-in ones with it.