Yep Side Attack dodge cancel got patched out unfortunately, it's legit impossible to do now. You can still do Side Attack (x1) jump cancel into Down Air tho, at least that's still in the game
Wonder Woman' Side Attack Dodge Cancelling recently got removed from the game after Patch 1.02. You can still jump cancel Side Attack (x1) into Down Air for Neutral Air drag down combos (skip to combo timestamp 1:17 for an example of Side Attack > JC > Down Air). "All characters now incur a 15-frame repeat-move lockout on their ground side attack combo. This will prevent individual fighters from alternating ground side attack and dodge to lock enemies in hitstun for extended periods of time." Combo Timestamps: 00:00 - Side Attack 00:03 - Side Attack (Dodge Cancelling) 00:08 - Neutral Attack 00:11 - Down Attack 00:14 - Up Attack 00:30 - Reverse Up Attack 00:36 - Up Attack into Neutral Air (Drag Down Combo) 00:47 - Down Air into Neutral Air (Drag Down Combo) 01:02 - Down Air into Up Special 01:06 - Up Air (Combo Starter) 01:10 - Dash Attack (Combo Starter) 01:13 - Neutral Air (Combo Starter) 01:32 - Side Air (Combo Starter) 01:40 - Lasso of Truth 02:02 - Down Attack (Combo Starter) 02:06 - Airwalker Perk 02:15 - Down Attack (Full Bracer Meter)