Hi,
Jeppesen offers all in feet. It’s a US company compared to Lido. I’m curious where you see a rounding - when you compare XN803, the AIP charts show 3900m / 12800 feet … so both are correct in the AIP and Jeppesen charts.
Most countries use feet as a global unit, but modern aircraft can switch between meters and feet. So, it should not be an issue for the cockpit crew to follow possible ATC instructions for the other unit (meter or feet).
Feet is international … and Jeppesen uses this unit in the data and charts.
I can’t see any problem here. Your example charts uses both units, Lido possible meters only and Jeppesen feet only. All is international and correct.