I don't know how to handle the alpha go 2 space jump

I had several games now in which my opponent copied the two space jump played by alpha go to ‘enclose’ the corner. My understanding is that this shouldn’t be enough to secure the corner and my opponent should expect to mainly gain influence from it.
But somehow I mess up the fight around that corner every time or wait way to long to attack it until my opponent gets both territory and influence from that corner.
Could somebody point out how to attack the corner in that demo board?

If somebody prefers to comment on a real game, here’s one I lost against my opponent making that move and gaining a huge corner from it

This should help you out: https://online-go.com/demo/view/229249