I cannot control the ACT and PWR leds after upgrading to linux-aarch64-5.15.13-1 from linux-aarch64-5.15.5-1 on the RPI3b+.
$this->bbcode_second_pass_code('', '
echo 0 > /sys/class/leds/ACT/brightness
-bash: /sys/class/leds/ACT/brightness: No such file or directory
echo 0 > /sys/class/leds/PWR/brightness
-bash: /sys/class/leds/PWR/brightness: No such file or directory
')