In about half of the reverb & H9 Special algorithms, you can emulate the Momentary and Latch freeze modes. You’ll need an Aux switch or expression pedal, to get in & out of the H9 FREEZE / INF parameter values.

But you can’t  currently simulate the glissando or Auto mode of the SuperEgo (with a single algorithm).  What you end up with is closer to the EHX Freeze pedal functions.  Many examples are scattered throughout the forum here.