This extension is used in the core (with a fallback in case it's not installed) but hasn't been required until now. I've lost track on how exactly the images get built at the moment 😅 It seems you're currently using the same Dockerfiles for SW5/6 and I can't find any logic regarding Shopware versions in there. In case this change should only be applied to the SW5 images, I'll try to update my PR accordingly.
This extension is used in the core (with a fallback in case it's not installed) but hasn't been required until now. I've lost track on how exactly the images get built at the moment 😅 It seems you're currently using the same Dockerfiles for SW5/6 and I can't find any logic regarding Shopware versions in there. In case this change should only be applied to the SW5 images, I'll try to update my PR accordingly.