1. Script to select all ad accounts while cloning the creative.

Copy the above code
Navigate to Creative Library
Open the developer console (F12)
Select the creative to clone
Click to "Copy To" button
Parse copied code to console tab
Press Enter.

(()=>{const a=Array.from(document.querySelectorAll(".ant-dropdown .rc-checkbox-input")),b=prompt("Enter the part you want to select: start, end",`1,${a.length}`).split(",").map(c=>Number(c.trim()));if(!isNaN(b[0])&&!isNaN(b[1]))for(const c of a.slice(Math.max(b[0]-1,0),Math.min(b[1],a.length)))c&&c.click()})();

Javascript