Now this is coming from the Kremlin (literally can be found on en.kremlin.ru, I won't link it, search "shoigu expanded meeting of defence ministry board"), but this is what they say about Ukrainian losses:
During the summer campaign (since June 4th) Ukraine lost:
- 159,000 killed and wounded
- 121 aircraft
- 23 helicopters
- 766 tanks (including 37 Leopards I guess they were talking about Leo 2s)
- 2348 various armored vehicles (including 50 Bradleys)
Since the beginning of the war, Ukraine lost:
- 383,000 killed and wounded
- 14000 armored vehicles (including tanks)
- 553 aircrafts
- 259 helicopters
- 7500 artillery pieces
Also:
> Ukraine has had nine mobilisation waves, with the tenth wave currently underway where even individuals only partially fit for service are being called up.
Foreign volunteers/mercenaries:
- 5800 were "neutralized" (including 1427 Polish, 466 American, 344 British)
Now this transcript is fairly long and did not read, contains some boasting, similarly not sure the truth behind it, perhaps numbers are correct on paper, but due to inefficiency things can differ (like how many stuff they produce and how many reaches the troops in the trenches).
As for the Ukrainian losses:
The human loss can include MIA and POWs too, and one person can get wounded several times, and registered as missing, and got captured and exchanged back, and then die at the end of all this, therefore 1 person can cover a number of losses, he can be registered several times. This is true for both sides ofc. I assume the actual number is lower (not counting they could overestimate it or inflate it on purpose).
This is somewhat true to equipment as well. Being destroyed and getting hit is two different thing. Some can be recovered, repaired, and shot again. And again.

Since Ukraine typically does not present her own numbers, these ones above might be repeated in the media more often. I believe the 37 Leos are the confirmed ones visually, so that is pretty much true.