Mostly incorrect, entering the BIOS and having the toggle to switch between S0 and S3 (or, “Linux”) sleep does indeed exist but it is hard to identify what models have it (I hear Lenovo’s BIOS simulator helps) and it’s increasingly being removed in newer models or even removed in updates. Dell has no interest in putting it back and recommends hibernate or just powering off the machine when on-the-go.
I made sure the ThinkPad I own personally had the toggle but my work-issued one does not so it is now a Hibernate-only machine. No setting can help that.