Tagline appearing in Header when viewed on Mobile but Not Laptop

try this to help narrow down the source of the issue (theme, plugin etc)…..install the Health Check plugin and use in troubleshooting mode to deactivate all plugins and use a default theme. reactivate plugins and theme 1-by-1 to find the source of the issue. (maybe there is something hard-coded into the theme?, maybe there are multiple versions of header or a conditional statment controlling display?)

documentation: https://make.www.ads-software.com/support/handbook/appendix/troubleshooting-using-the-health-check/

if the source is the theme – you could request guidance from the Plainly theme’s support team: https://www.ads-software.com/themes/plainly/ (note: This theme?hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.)