Linkhandler

With a proper configuration of linkhandler function you can select events in Link wizards and RTE. Details at https://usetypo3.com/linkhandler.html This configuration is enabled by default.

Page TS Config

TCEMAIN {
        linkHandler {
                tx_calendarize_domain_model_event {
                        handler = TYPO3\CMS\Recordlist\LinkHandler\RecordLinkHandler
                        label = Events
                        configuration {
                                table = tx_calendarize_domain_model_event
                                storagePid = xxx
                                hidePageTree = 1
                        }
                        scanAfter = page
                }
        }
}