AC mains current monitoring
Allegro is the right Idea [it's one of the top names in my head when it comes to high current messurement]. They have chips which are suitable. A just very quick look on their product table: E.g. https://www.allegromicro.com/en/products/sense/current-sensor-ics/zero-to-fifty-amp-integrated-conductor-sensor-ics/acs730#PartTable should be better than the ACS712.
LEM is also an known company for isolated high current messurements, like:
https://www.lem.com/en/lzsr-series
https://www.lem.com/en/hmsr-miniature-current-sensors

Other Options are isolated current sense amplifiers (here TI and Analog Devices are the names on my list...)
maybe
https://www.ti.com/product/AMC1300/datasheet
AD's current product range seems to offer isolated ADC's for that purpose:
https://www.analog.com/en/parametricsearch/11101#/

the solutions with hall like Allegro and LEM have the advantage of less looses. But I guess are more expensive.