if you are using Chinese RIms then there is porbability that they could not be balanced due to manufacturing fault in rims.
Rims with out of spec off set can also cause this issue at higher speeds.
Wat is the manufacturing date on ur dunlops? grey market purchase or under warranty?
smuggled tyres come folded for long time in such a way which makes the structure of tyre deformed.
P.S. i got delivery of Alto in Mar 22, took it for test drive on motorway, found wobbling issue, went back to dealership, they balanced the tyres mentioning that factory staff took take this balancing job very seriously to save some time as they wont test it at higher speed in factory.
since then, its working fine with stock rims and tyres. no virations , wobbling etc, goes upto 140 effortlessly planted on road, almost driven 7000 till now as being 3rd car