Some more links that may be of help.
https://manual.limesurvey.org/Participant_settings#Enable_token-based_response_persistence
https://manual.limesurvey.org/Participant_settings#Allow_multiple_responses_or_update_responses_with_one_token
A more sophisticated way to send automated mails:
https://gitlab.com/SondagesPro/mailing/sendMailCron
Of course you may develop your own cron-based application to send invitations.
This could be of interest though seems to be broken at the moment.
https://gitlab.com/SondagesPro/managament/autoCommentIterativeQuestionnaire
https://manual.limesurvey.org/Participant_settings#Enable_token-based_response_persistence
https://manual.limesurvey.org/Participant_settings#Allow_multiple_responses_or_update_responses_with_one_token
A more sophisticated way to send automated mails:
https://gitlab.com/SondagesPro/mailing/sendMailCron
Of course you may develop your own cron-based application to send invitations.
This could be of interest though seems to be broken at the moment.
https://gitlab.com/SondagesPro/managament/autoCommentIterativeQuestionnaire