For what it's worth, the FAANG companies generally don't have DBA roles as far as I'm aware. It's generally expected to be part of the software engineering role.
I'm not saying this is correct or better, just saying that's the way it is and it does set a precedent and model for other companies.
Facebook used to keep "Data Engineers" on staff back in 2017 which more or less played a DBA role across their massive data infrastructure. I don't know if that's still the case.
Not necessarily true. FANG has data engineers filling the DBA role. Google also had O ladder folks doing DBA like work in support of Sales Ops, HR, and other (mostly) non-tech organizations.
I'm not saying this is correct or better, just saying that's the way it is and it does set a precedent and model for other companies.