There are directions to get this printer working under [SOLVED] CUPS and Brother HL-L2447DW / Applications & Desktop Environments / Arch Linux Forums, but I was not able to replicate them for the longest time (a year or so).
Today, something finally clicked, and this may be helpful for someone, so I wanted to share. If this is not the correct way to do it, I apologise and am open to correction.
After installing the basic printing system (CUPS), I could locate the alternate model driver compatible to the HL-L2447DW, which is the HL-L2340DW, despite CUPS never offering it, via “yay -S brother-hll2340dw” in the terminal. (Yay had to be installed, first, obviously). Rebooting, entering (http://localhost:631) towards the CUPS web interface enabled me to add a printer, have it detected and found via usb connection, and then I had to manually select the PPD file, which the earlier yay command obtained. The location of that file was obtained via “sudo find /usr -name “*.ppd” | grep -i l2340” so I could select it in the web interface.
I clicked on add printer and it worked like magic.