I was playing around with this more and actually got pretty good results overriding some CSS to expand the formula editor:
/* Allow a wider view */
.formula_builder--root--MsCMk97F {
width: 800px;
}
/* Allow a bigger height - would be better to calc() this in relation to current y position, but this works as a simple solution */
.formula_editor--root--1bazHdJA {
max-height: 100%;
}
/* Allow for a wider width for a different view (I don’t remember exactly why I created this) */
.canvas_formula--popover--jY_Gbymw {
width: 800px;
}
Put these into your favorite browser extension to inject CSS, I was using Chrome extension “User JavaScript and CSS”