You know there is a pipeline from Russia to China,yes?
Gas and oil pipeline.
So,we agree on China but i dont think India can be pressured with the engines.
@Nilgiri bro,shed some light.
Yah, India is nuclear power with lot of missiles (and looking to get brahmos numbers from say 1500 deployed now to x2 or x3 with further upgrades).
The force levels there are magnitudes more in the end than new fighters (and the routes available switch to France, Russia for that for engines of course with the % penalties of course on time, performance what have you...or just buying/producing stopgap platforms away from Tejas which has 404 locked into it etc)
But those %'s are small costs and thus small leverage to bear in the overall force level going from say 2020s to 2030s to 2040s etc. i.e they are still important but only so much in grand scheme of things.
Sudden fighter jet engine sanctions would just damage relations (and end things like tthe Quad) but will do nothing on pressuring. India will simply hedge more with Russian military ecosystem. There is reason India felt most comfortable with Russia for the SSBN Arihant class consultancy and reactor minitaurisation help etc that followed smoothly from the SSN leasing from Russian navy too.
i.e there is proven track record of reliable you get what you pay for there and it was demonstrably not upset by any nuclear-test sanctions in 90s/2000s like US did (Russia voiced concerns thats it). In naval domain the Soviet admirral Gorshkov was instrumental in pushing this relationship with India to have a strategic longterm after the 1971 war (where the US was caught on the wrong side and forms some large part of continued Indian geopolitical memory and strategy).
The US approach to India will have to be bite sized, granular and direct. i.e if there is problem with Russia's oil trade with India, it will have to be consistent on it past India (with other heavy buyers like China, given China's large capital assistance to Russian military production by same argument past that).....and will have to first admit that the Janet Yellen policy under Biden with "we welcome India buying all it can from Russia under these price caps" is being reversed and why.
Then the oil sanctions on Russian producers directly (like done recently, after all the brouhaha drama that Trump is a Putin puppet and is heavily anti-Zelensky from earlier in the year) along with US own shale oil and gas supply expansion to Indian buyers is the way to go regarding precise carrot and stick that can work and is logical and predictable.
Transgressing to other domains will not work (like the 50% tarrif approach that Trump is TACO'ing on already) and will just invite more unreliablity + untrustworthiness in Indian elephant memory of American geopolitical strategy to add to the previous chapters.