Putin is perhaps delusional if he thinks that he can make agreement with the west in which Ukraine will abandon areas in 4 governorates : Donetsk, Zaporizhia, Kherson and Luhansk (although Russians almost captured whole of Luhansk ) not to mention Ukraine disarming itself.
It seems that you do not have full up-to-date information due to total media censorship in Western countries.
The four regions (LNR, DNR, Zaporozhye and Kherson), which are part of Russia according to the Constitution, have never been a subject of bargaining with the West. This is part of Russia and this is not discussed with anyone.
Now the subject of bargaining with Trump is how far (from the Russian borders) NATO troops will withdraw from Ukraine (as well as from Romania, Poland, the Baltics, Transcaucasia, Germany).
Russia has the right to take ANY regions of Ukraine it wants (and it will take them, including Odessa, Kharkov, Nikolaev and other Russian cities), since it is actually destroying NATO troops on the battlefield, grinding them into dust. Russia will not limit itself to Ukraine, but will go further, eliminating the danger around all its borders (north, south, west and east). Putin (after he sorts out NATO in Ukraine) will call to account ALL the others who supplied weapons and troops to Ukraine, and also used their territory to attack Russia (this is Poland, Romania, the Baltics and Finland, etc.)
Russia could act 10 times faster, but this is not necessary.
The current speed of Russian troops' advance to the West is justified by the fact that:
1) Russia's economy is growing at a rapid pace, gold and foreign exchange reserves have reached enormous numbers, Russia has never been so rich since 1991. The savings of ordinary citizens are also increasing, and this has never happened in modern history.
2) Russia is saving troops, avoiding unjustified losses. Putin himself recently said this.
3) Russia will continue to show mercy to ordinary citizens who are not military personnel of the Armed Forces of Ukraine. Therefore, it is necessary to liberate every house, and not to conduct carpet bombing of the territory (as the Zionists are doing in Gaza).
4) When liberating territory, Russia tries to IMMEDIATELY restore and rebuild infrastructure, houses, factories and plants. Mariupol, taken in 2022 and destroyed, was almost completely restored and populated by residents (around 500,000 people, like in the USSR) 3 years later. Other cities and villages are also being restored, but you are not able to restore a country the size of France on your own. You need to bite off as much of the pie as you can swallow. 5) Russia continues to reform its army in wartime conditions and introduce innovations at an accelerated pace. Already from the example of other conflicts (India-Pakistan, Israel-Iran, etc.) it is clear how other countries are lagging behind Russia in terms of rearmament