still no drivers for Brother HL-L2300D series these are what i use
I have a similar printer from Brother (hll2350dwp). A driver is also not available by default for this model.
To resolve this, I downloaded the RPM package from Brother’s support page and installed it using rpm-ostree:
rpm-ostree install ./your_driver_file.rpm
After a reboot, I was able to set up the printer via CUPS.