> how little the US has actually given to Ukraine

I suppose everything is relative, but I don't think I'd call it "little".

To date, the United States has provided approximately $51.0 billion in military assistance since Russia launched its premeditated, unprovoked, and brutal full-scale invasion of Ukraine on February 24, 2022, and approximately $53.8 billion in military assistance since Russia’s initial invasion of Ukraine in 2014.

Air Defense

One Patriot air defense battery and munitions;
12 National Advanced Surface-to-Air Missile Systems (NASAMS) and munitions;
HAWK air defense systems and munitions;
AIM-7, RIM-7, and AIM-9M missiles for air defense;
More than 2,000 Stinger anti-aircraft missiles;
Avenger air defense systems;
VAMPIRE counter-Unmanned Aerial Systems (c-UAS) and munitions;
c-UAS gun trucks and ammunition;
mobile c-UAS laser-guided rocket systems;
Other c-UAS equipment;
Anti-aircraft guns and ammunition;
Air defense systems components;
Equipment to integrate Western launchers, missiles, and radars with Ukraine’s systems;
Equipment to support and sustain Ukraine’s existing air defense capabilities;
Equipment to protect critical national infrastructure; and
21 air surveillance radars.

Fires

More than 40 High Mobility Artillery Rocket Systems and ammunition;
Ground-Launched Small Diameter Bomb launchers and guided rockets;
198 155mm Howitzers and more than 3,000,000 155mm artillery rounds;
More than 7,000 precision-guided 155mm artillery rounds;
More than 50,000 155mm rounds of Remote Anti-Armor Mine (RAAM) Systems;
72 105mm Howitzers and more than 800,000 105mm artillery rounds;
10,000 203mm artillery rounds;
More than 400,000 152mm artillery rounds;
Approximately 40,000 130mm artillery rounds;
40,000 122mm artillery rounds;
60,000 122mm GRAD rockets;
47 120mm mortar systems;
10 82mm mortar systems;
112 81mm mortar systems;
58 60mm mortar systems;
More than 400,000 mortar rounds;
More than 100 counter-artillery and counter-mortar radars; and
50 multi-mission radars.

Ground Maneuver

31 Abrams tanks;
45 T-72B tanks;
More than 300 Bradley Infantry Fighting Vehicles;
Four Bradley Fire Support Team vehicles;
189 Stryker Armored Personnel Carriers;
More than 400 M113 Armored Personnel Carriers;
250 M1117 Armored Security Vehicles;
More than 1,000 Mine Resistant Ambush Protected (MRAP) Vehicles;
More than 3,000 High Mobility Multipurpose Wheeled Vehicles (HMMWVs);
More than 200 light tactical vehicles;
300 armored medical treatment vehicles;
80 trucks and 144 trailers to transport heavy equipment;
More than 1,000 tactical vehicles to tow and haul equipment;
153 tactical vehicles to recover equipment;
10 command post vehicles;
30 ammunition support vehicles;
18 armored bridging systems;
20 logistics support vehicles and equipment;
239 fuel tankers and 105 fuel trailers;
58 water trailers;
Six armored utility trucks;
125mm, 120mm, and 105mm tank ammunition;
More than 1,800,000 rounds of 25mm ammunition; and
Mine clearing equipment.

Aircraft and Unmanned Aerial Systems

20 Mi-17 helicopters;
Switchblade Unmanned Aerial Systems (UAS);
Phoenix Ghost UAS;
CyberLux K8 UAS;
Altius-600 UAS;
Jump-20 UAS;
Hornet UAS
Puma UAS;
Scan Eagle UAS;
Penguin UAS;
Two radars for UAS;
High-speed Anti-radiation missiles (HARMs);
Precision aerial munitions;
More than 6,000 Zuni aircraft rockets;
More than 20,000 Hydra-70 aircraft rockets; and
Munitions for UAS.

Anti-armor and Small Arms

More than 10,000 Javelin anti-armor systems;
More than 90,000 other anti-armor systems and munitions;
More than 9,000 Tube-Launched, Optically-Tracked, Wire-Guided (TOW) missiles;
More than 40,000 grenade launchers and small arms;
More than 400,000,000 rounds of small arms ammunition and grenades;
Laser-guided rocket systems and munitions;
Rocket launchers and ammunition; and
Anti-armor mines.

Maritime

Two Harpoon coastal defense systems and anti-ship missiles;
More than 70 coastal and riverine patrol boats;
Unmanned Coastal Defense Vessels; and
Port and harbor security equipment.

Other capabilities

M18A1 Claymore anti-personnel munitions;
C-4 explosives, demolition munitions, and demolition equipment for obstacle clearing;
Obstacle emplacement equipment;
Counter air defense capability;
More than 100,000 sets of body armor and helmets;
Tactical secure communications systems and support equipment;
Four satellite communications (SATCOM) antennas;
SATCOM terminals and services;
Electronic warfare (EW) and counter-EW equipment;
Commercial satellite imagery services;
Night vision devices, surveillance and thermal imagery systems, optics, and rangefinders;
Explosive ordnance disposal equipment and protective gear;
Chemical, Biological, Radiological, Nuclear protective equipment;
Medical supplies, including first aid kits, bandages, monitors, and other equipment;
Field equipment, cold weather gear.

To date, nearly 50 Allies and partner countries have provided security assistance to Ukraine. Among their many contributions to Ukraine, Allies and partners have delivered 10 long-range Multiple Launch Rocket Systems (MLRS), 178 long-range artillery systems, nearly 100,000 rounds of long-range artillery ammunition, nearly 250,000 anti-tank munitions, 359 tanks, 629 armored personnel carriers and infantry fighting vehicles (IFVs), 8,214 short-range air defense missiles, and 88 lethal UAVs.[0]

[0] https://www.state.gov/u-s-security-cooperation-with-ukraine/