However, in the interim, animated text widgets have become popular in various PageBuilders or their addons. However, there is a free and simple way to use the <marquee> tag in most of the top end PageBuilders. What I have done below is use the Thrive Architect HTML Content widget to implement various versions of the <marquee> tag with different attribute settings. I have tried the same HTML in widgets supplied by Beaver Builder, Divi, Elementor, and Visual Composer with success. So for users looking to add Animated Text to your WordPress Pages, just use a top-end PageBuilder.
Marquee with default options
Marquee with behavior=alternate and scrollamount=speed=2
Marquee with direction=left behavior=slide and scrollamount=8
Marquee with up direction speed=2 and grey background
Marquee with down direction and height=40 and speed=1
There are ten attributes to control the <marquee> tab – see here for all the details.