here are the amendments to boot/config.txt file. For BULLSEYE, you have to use different parameters to make them work

these work for pi3 and pi 4

Pre BULLSEYE

Disable the PWR LED
dtparam=pwr_led_trigger=none
dtparam=pwr_led_activelow=off

Disable the Activity LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off

Disable ethernet port LEDs
dtparam=eth_led0=4
dtparam=eth_led1=4

BULLSEYE ONLY

Disable the PWR LED
dtparam=pwr_led_trigger=default-on
dtparam=pwr_led_activelow=off

Disable the Activity LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off

Disable Ethernet port LEDs
dtparam=eth_led0=4
dtparam=eth_led1=4