Stable Approach Policy criteria (inter alia) of an EASA-certified airline that operates Airbus and Boeing:
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An approach is considered stable when all of the following criteria are met:
In the planned landing configuration........
Stabilised on the correct vertical profile........
Stabilised at the target approach speed (taking into account the prevailing conditions – see Note).........
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The 'note' has words to the effect that, exceptionally, the speed may be above the target at 1000ft provided that it is reducing and that the crew are confident that it will be at the target value by 500ft. If this is not achieved, a go-around will be flown.
So, although there is no mention of engine thrust/power/rpm/EPR, it is implied that the engines may be at idle at 1000ft while the speed reduces to the target. If the target speed is achieved by 500ft, the engines will be spooling up to maintain the speed; however, there is no explicit requirement to check that this is so.