Hello,

The thing is, firstly the Widget related to Menu available under the Dashboard > Appearance > Widgets is the default WP end one and in that there isn’t any option available to spread them out like you have mentioned.

They appears vertically for the Desktop views like it is shown here: https://snipboard.io/I26nwp.jpg

The alternatively possible is through the HTML Block way that you have already used. But if you want to have the Accordion style for the Footer Menu then you can do one thing within the HTML Block made Footer. Please refer to the following Video guide for that: https://www.veed.io/view/d4b9e732-2641-46e0-9826-83774a4953ed

Best Regards