TL494/TL594 measure current with grounded load
The configuration of the amplifier as shown in the question is not quite right, as differential amplifiers will yield better results. If the load doesn't mind a small voltage bump from the sense resistor, low side configurations are preferable. Either way, use one of these configurations:


Source: https://www.mouser.in/new/Texas-Instruments/ti-vishay-current-sensing/

Another option (that requires less resistors) is to use instrumentation amplifiers, check the common mode range.

Find the max voltage through the sense resistor and then calculate the gain of the differential amplifier.