Be careful. Brother is doing shaddy things this days, like lowering printing quality, or not printing, if a non-Brother toner is detected. E.g. https://m.youtube.com/watch?v=NzaRVEzYuz8 for a toner hack that shouln't be needed.
As far as I know they're still not doing any nonsense to force you to use their toner - but even if they did I probably wouldn't care as the original toner is cheap enough that I just can't be arsed to figure out good compatible ones.
"Brother printers do not intentionally degrade print quality based on whether a Brother Genuine or third-party ink/ toner cartridge is used."
https://www.theregister.com/2025/03/06/brother_firmware_upda...
https://arstechnica.com/gadgets/2025/03/brother-denies-using...