For the last 3 weeks, Ukraine has been slowing taking out bits and pieces of Russian's air force.
A few Mi-8 helos have been taken out by a FPOV drone in the air and a few on the ground. They have taken out some sub hunter planes and transports. They just shot down a bomber on the front line.
For the most part, Russia is using their air defense to protect fighters/bombers on the ground, so Ukraine is going for all of the support airpower/radar.
Last year Ukraine attacked Russian refineries in the fall because the harvest is when they use the most gas. They hit refineries with drones carrying 100 kgs only or less of explosives. Those hits were quickly repaired.
We are now seeing the biggest refineries being hit weekly with 20+ drones at a time. In addition they are hitting pumping stations and trail junctions. Their focus is to also hit the trains in key locations so the Soviets are stalled in not only repairing the rails which can be done quickly but moving the destroyed trains. There is gas shortages in 10 provinces.
Russia is gaining about 500 square km/200 square miles per month which is about a 22 mile x 22 mile square. Russia was most successful getting behind Ukrainian lines by moving soldiers through underground tunnels. They had created rail carts where soldiers had to sit on them for 3 days straight to get to the end. It did work near Kupyansk which is a gate way city past the Ozil River. They attempted it other places but Ukraine soon stuffed tunnels leading into cities with barded wires.
Pokrovsk is still surrounded in 3 directions and was expected to be overrun last winter it still stands. It could be this war's Leningrad. Russia had changed tactics by sending sabotage groups and ones and twos past Ukrainian lines which are undermanned because you don't want to group men due to drones.
This had caused a panic where Ukrainians left the front line because they didn't know how large the forces behind them were. Russia pushed forward 17 miles. The Ukraine's best forces (Azovs) went in and started cutting narrow bands across the Russian from their supplies. They have created 3 pockets of surrounded Russians and may soon have a 4th. They are starving the Russians suckering the Russians in sending men to go and rescuing them. At this point a few thousand Russians have been killed. Russians are resupplying these islands of men with drones with Ukraine happy to camp and wait for Russians to come down a narrow road to rescue them.
The US has mentioned that they may send Tomahawks to Ukraine (around 1,000 km range). Ukraine claims to be able to make one Flamingo missile that can go 3,000 range with a payload of 1,150 kg per day however we haven't seen much of them yet. It looks to be inconsistent in terms of precision. If they can get the prevision down, they can seriously halt Russia's war machine.
They just hit a e-jamming factor with what people think is a flamingo today.
The crazy thing is that Ukraine can crate these precision bombs with off the shelf components. I saw a youtube show a website where you can buy a gps guidance kit with electronic warfare protection for $6,000 on the web. Naturally, the ad said, "for legal non-lethal use only."