Marshall’s Mid A.N.C. support page confirms its ear cushions are changed by holding the ear cap and turning anti-clockwise. This supports the target model and replaceable/twist-off cushion mechanism; it does not independently certify Brainwavz’s aftermarket pads.
Brainwavz explicitly lists these aftermarket earpads as designed for Marshall MID-ANC Bluetooth headphones. The product page identifies the pads as Brainwavz-made, gives part number BWAVZ-EP-MS-MIDANCBT-PU-BLK, lists dimensions of 70 × 70 × 20 mm, and says to twist the earpads into place.