Steps to reproduce the issue

Convert basic Joomla 3.9.21 site to 3.10.0 to 4.0.0

See Post installation messages

Expected result

Title and description of message

Actual result

See only language constants
PLG_PLG_RECAPTCHA_VERSION_1_POSTINSTALL_TITLE and PLG_PLG_RECAPTCHA_VERSION_1_POSTINSTALL_BODY
TPL_HATHOR_MESSAGE_POSTINSTALL_TITLE and TPL_HATHOR_MESSAGE_POSTINSTALL_BODY
COM_CPANEL_MSG_JOOMLA40_PRE_CHECKS_TITLE and COM_CPANEL_MSG_JOOMLA40_PRE_CHECKS_BODY
COM_CPANEL_MSG_HTACCESSSVG_TITLE and COM_CPANEL_MSG_HTACCESSSVG_BOD

System information (as much as possible)

Additional comments