Yes, A4000, A5000 and the recently launched A4500 are being used in mining as they do not have a hashrate limiter. A6000 is not used because of its price/performance.

The A4000 prices recently shot up from $1100 to $1600 Locally. A4000 has the worst cooler being a single slot blower card. A5000 has a fantastic cooler.

On ETH:

A4000 does 61-63Mh at 140w.

A5000 does 102MH at 230w.

A4500 is expected to do around 80-85Mh/s.

In gaming A4000 is a little slower than a 3070, A5000 is slower than a 3080.