I think it would be very, very difficult to sink. Quite aside from the (hopefully) large number of bulkheads and other such safety measures, the ship will be close to maximum draft for the canal and as such would only be able to sink a metre or two anyway. True, you'd then need to refloat it in situ, which would not be fun ... and it would probably just become more stuck rather than less.

I think it's just going to take time and lots of digging.

Yes, it probably wouldn’t irreparably sink or something like that. Still, specialized recovery work would take even more time. Not to mention the possibility of containers falling down.

Best to take it slow and steady.

Suez canal is 24 meters deep. i count 9 iso containers stacked high on the deck (an iso container is 2.59m high).

Smit will be making bank on this.