In Appearance > Widgets panel you can see the list of available widgets and widget areas.
Here’s how they work – each theme has default widget areas, such as Footer widgets, Header Left widget, Header Right widgets, etc.
Some themes have custom widget areas made for each homepage in order to have different widgets on them.
The purpose of custom widget areas is to override the default widget areas on certain pages.
Custom widget areas are added in Appearance > Sidebars panel, by selecting which default area they will replace and on what page(s) they will display.
Once you select your homepage, go to Appearance > Widgets and check if that homepage has its own custom widget area.
If it does, you have two options – first is to move widgets from this custom widget area to a corresponding default area.
Other solution would be to simply assign that custom widget area to display on all pages by selecting them in Appearance > Sidebars panel.
*Example is from Renata theme, but the principle is the same for all of our themes.
Below you can find the list of all available widgets: