Good God, I hope everyone in Congress recognizes what this bill, which apparently has now passed and Biden will sign it (seeing as he asked for it directly), means.
Let's recap. Per our Constitution the military is under civilian control. That is, the actions of the military, including weapons used by same or suitable for same, are under the control of Congress and The Executive.
Congress must authorize anything that leads to expense, and such must come from The House. Again, this is basic Constitution stuff.
Now Congress has explicitly authorized, and Biden will sign, this bill that specifically permits the transfer to Ukraine of basically anything other than nuclear material. Seriously folks -- that's the only real exception found in the referenced definition.
By agreeing to provide direct weaponry that can be and will be used in the waging of war by one of the two parties to same we have entered the conflict. That our GIs are not directly there is of no consequence. This is no different than shipping arms to Britain during WWI in the Lusitania or the lend-lease provisions in early WWII that ultimately led us to get involved there in Europe. Indeed Pelosi directly referenced those early WWII provisions indicating that she knows damn well the implications of what Congress just did.
In fact it was lend-lease of March 1941 that led Hitler to come after the United States; we had entered the war as a belligerent by officially agreeing to supply war material to Britain.