“who will purchase Russian energy products?”
You can start by seeing what CNN has to say...
https://www.cnn.com/2023/04/14/energy/russia-oil-exports-iea-report/index.html
It turns out that the world has turned to buying its oil from that well-known petroleum power house - India. Where is India getting the oil from - oh yeah, don't look now.
Your link is for OIL exports no mention of gas.
FROM YOUR LINK;
“The revenue is still down 43% from a year ago, the IEA said,as Russia is forced to sell its barrels to a more limited pool of customers who can negotiate greater discounts”
Yes China and India are buying CHEAP at a major discount.and at the same time selling DEAR, the clever bastards!
That is called arbitrage.
The more China and India sell the lower the world price, as supply may exceed demand.
And just for fun China and India are paying Russia in Yuan and Rupees!!! Not at all good for Russia.