@engineer,
It's confirmed now that Russia has bought drones from the Iranians and artillery ammunition from North Korea.
Not even the Chinese were willing to give Putin weapons, but Iran does.
A Russian victory would cement relations with Tehran. Therefore, Israel, for example, must also be very worried that the Republicans could win the midterm elections in the USA. If they had the majority in Congress and the Senate, they would give less support to Ukraine than before, as they have already announced.
If the situation continues like this, that is, if Russia gets stuck in Ukraine and Iran continues to be isolated because of the sanctions, then perhaps in four to five years Russia will be a Chinese vassal state and Iran will be a Russian vassal state.