That they aren't doing that, means they don't actually have the will to defend Ukraine against Russia. Ukraine trying to play a little land border game isn't going to change that reality.
This is an oversimplification. They are willing to. However there is a hug step from offering economic support to sending your own troops on the field.
On a tactical level they probably already have more than enough breathing room to be able to mobilize (which I would imagine the US has already done) every information gathering asset in the region to provide Intel to the Ukrainian troops. As far as I'm aware there are already publicly documented AWACS aircraft on patrol as you'd expect.
I have family by a few RAF bases with some saucy planes but it would be foolish to comment on it in a time like this so gossip will stay as such.
Is it going to fight Russia?
That leads to nuclear war.
https://www.europarl.europa.eu/meetdocs/2009_2014/documents/...
Even when invaded being conquered represents a lesser loss than being blown up so one would logically either preemptively accept defeat or at least withhold your nukes while the enemy grinds you down using traditional means.
It would seem vastly more rational to work together to destroy the aggressor. If you really think current leadership will nuke you rather than be defeated then remove that leadership and see if the next leadership feels the same way.
Will we allow Putin to murder Ukraine, then Finland, then Sweden, then what? How many other lives is one mans life worth?
Do you have any other ideas? We need moar
Europe has been woken up to it's need to spend more on defense.
Ukrainians have been hardened against Russia.
NATO was given a chance to show it's worth
(And that's something we may regret, because I don't think Russia was willing to have a land war with a bunch of European armed forces either)
C'mon man, do you actually think that this will work?
Just like if an American buys a house in Russia, it won't mean now that USA can militarily defend it.
Every piece of land has actually two owners: the sovereign nation and the civilian/company "owning it" as understood in regular speech.