You can but the routing and switching can be tricky if you want to use auto-engage with it. You'll need to assign the expression pedal to all the desired blocks at the same time and then use other blocks to control the signal flow in order to select which one you want to actually hear. You can use null filter blocks set to Mute Out bypass mode behind the pitch and wah blocks to work as a path selector. If the two can be placed in parallel, you can also use a mixer block instead to select between them. Auto Engage will turn the wah and pitch blocks on at the same time if enabled on those blocks and the pedal will still control the assigned parameter in each, but you'll only hear the one whose following filter block is enabled or is selected via the mixer block. For Wah, Pitch, and Volume, you'll also need two IA switches, one to select between either wah or pitch effects and the other to select between volume or effect. You could also use scenes in place of IAs to handle the switching too.