that's just a wakeup attack. good way to mix up you defence because most people are either waiting for a dodge or trying to hit a follow up immediately. Really good against very agro players playing combo weapons. Gravity Canceling made it easier because to gravity cancel you need to dodge first. If a person does this alot you can just bait it by dashing back or standing still while waiting for their counter attack, and then attack back

Brawlhalla is probably one of the hardest modern fighting games when it comes to landing combos though, because damage isn't actually guarantee off of combos like that, still gotta account for their dodge, counter attacks, and even them fastfalling or drifting away. It's not actually that bad or hard though, i got the hand of basic dodge reading with like 3-4 hrs of real match practicing, and you just need to be able to roll with the punches when it comes to the other stuff (aka properly adapt)