This theme was made for Deltic and you can find it in his repo (branch v3).

https://github.com/Deltik/e107-theme-jayya/tree/v3

The temp demo is here: https://jayya.e107sk.com/ but it will be removed soon.

Originally theme name was jayya3, but it was renamed back to jayya. 

Added

• Bootstrap 5 library
• FontAwesome 5 library
• Footer navigation in the footer
• menuarea in top-center header position
• menuarea in top-right header position
• Two ways for menu behavior on mobile devices (off-canvas or standard dropdown)
• Accordion behaviour for sidebars. By default, closed on mobile devices.
• Dropdown on hover

Changed

• Only the MoreBlue style is supported for now.
• Replaced outdated {ALT_SITELINKS} shortcode with main {NAVIGATION} shortcode
• Bullet for link lists is possible to set in theme preferences
• Increased the base font size and related stuff. Default bootstrap size (1 rem) is used.
• Background images replaced with gradients (main navigation, buttons, sidebars)
• Removed clock menu support

Fixed

• Core signup template for Bootstrap 5
• Core login template for Bootstrap 5

For any other issues, questions, development, use Deltic's repo. It is his theme now.