Typically many periodontists would say the gold standard is a FGG to help in those type of cases. Also, placing your implants deeper especially in thin biotype patients will greatly improve those cases as well.

For vertical tissue growth, one successful technique i’ve been able to do especially in locator cases is using Alloderm. It will require a flap but essentially you release the flap like a GBR, use healing abutments to tack the alloderm along with sutures and close the flap. Don’t necessarily need air tight closure but I would definitely not leave it too exposed or it will smell bad or get infected. Additionally, if you need more keratanized tissue on facial aspect, a FGG would be appropriate like Jedediah mentioned.