No, the eTap AXS Wireless Blips cannot perform Multishift functions for the AXS rear derailleur. Multishift actuation requires a shift button that sends a constant signal while shifting. The eTap AXS Wireless Blip does not feature the continuous press function required for Multishift. When using Wireless Blips, your primary AXS controllers will remain functional in Multishift mode.
To find out more about Multishift and Enhanced Shift Modes, check out our FAQ article on Enhanced Shift Modes.