Grid_options when using apexchart-card and config-template-card

Hi, I’m using apexchart and config-template cards to add a date picker to my chart. Between Gemini and posts here, I managed to get there in the end (Gemini didn’t realise the config card uses JS and not jinja, and I’m not a coder so don’t know the difference between them!) but I can’t seem to resize my chart anymore.

I’ve tried the layout options and grid_options but the card stays the same size.

Any help would be amazing, thanks.