Epson does not provide an official driver for the LQ-300 dot matrix printer on Windows 11. However, you can use the built-in generic driver or the Windows 10 driver to make it work.
Title: Epson LQ-300 Driver for Windows 11 – Installation Guide
Use the built-in "Epson LQ Series 1 (136)" driver.
The Epson LQ-300 is a legacy dot matrix printer. As of Windows 11, Epson has not released a dedicated driver for this model. Do not worry – the printer still works using native Windows drivers.