Hi!

There is no strict limit in steps number. You are basically limited by global request timeout, so you should consider your steps should be completed during 15 seconds on average (so you have another 15-20 seconds for proxy lags during requests).
The best way to see available steps is to check https://scrapeninja.net/scraper-sandbox dropdown (click “evaluate js”, then “interact with page” checkboxes)

Cheers!