Via the resistance developers at Ragtag, I learned that Fight for the Future is helping provide tools to let you digitally join the climate strike. On their site you’ll find social media resources, banner ads, and lists of other participants.
The WordPress plugin listed there is installed and ready to use for all sites on the Indivisible.blue network. Just activate it on the plugins page, and enable the footer and full-page widget settings as you like. Contact me by form or email if you have any questions or run into any problems.