This TYPO3 extension allows the Link Validator to check links inside TemplaVoilà! Plus elements. Tested with TYPO3 7/8/9 LTS and TemplaVoilà! Plus https://github.com/pluspol-interactive/templavoilaplus
Install this from TER https://extensions.typo3.org/extension/ppi_tvplus_linkvalidator/ or clone this repository to typo3conf/ext/ppi_tvplus_linkvalidator:
git clone https://github.com/pluspol-interactive/ppi_tvplus_linkvalidator