With #homeassistant, configuring remotes is incredibly annoying. You create a separate automation for every key function or you search for a blueprint on the internet, of which there are dozens for each remote claiming to finally be the best one.
Homeassistant has no concept of start/stop dimming, so all implementations use a variant of this ugly hack:
while (button_still_pressed) {
increase_brightness(5%, 1 second);
sleep 1 second;
}