I use this one on my supermicro server board with a VGA monitor connection:
https://www.amazon.com/Monitor-Connector-VENTION-Adapter-Computer/dp/B08GZ159FJ
If you really do have VGA - you can buy this adapter to convert to hdmi and plug in an hdmi cable to your monitor or screen -> https://www.amazon.com/Monitor-Connector-VENTION-Adapter-Computer/dp/B08GZ159FJ/
Then the only thing you need is a vga-to-hdmi converter, as you already have the other hdmi port.
Something like this:
https://www.amazon.com/dp/B08GZ159FJ/ref=cm_sw_em_r_mt_dp_XC7GJE8MWY6M424Z4VPK
A converter like this one I think would do the job:
I’ve never tried it so I can’t comment on how well it works but it should keep the 480p resolution. Maybe someone else can chime in if they’ve tried it.