An invasion is a military offensive of combatants of one geopolitical entity, usually in large numbers, entering territory controlled by another similar entity, generally with the objective of either: conquering; liberating or re-establishing control or authority over a territory; forcing the partition of a country; altering the established government or gaining concessions from said government; or a combination thereof.

https://en.m.wikipedia.org/wiki/Invasion

Neither can Hamas field large numbers, nor is Israel a similiar entity, as it is an established nation state with a well armed military, nor is the goal to conquer or establish authority over the areas attacked. The only criterium that is fullfilled is the "gaining concessions" part.

And comparing this to the russian invasion of Ukraine is just silly. Or did i miss the videos of kilometre long convoys driving onto Jerusalem, and hundreds of aircrafts launching from Gaza? I've seen some videos of guys in a motorized paraglider. But you dont want to really consider that equal to a fighter jet or attack helicopter do you?