Yes. HPV is transmitted via skin-to-skin contact and therefore women in same sex relationships are still at risk of carrying the virus and potentially developing cervical cancer as a result.
Yes. The HPV vaccine is very effective at protecting against some types of HPV but it does not protect against all types of HPV.
HPV (human papilloma virus) causes nearly all cases of cervical cancer. HPV is commonly transmitted without symptoms during sexual intercourse, and as many as up to 4 out of 5 people will carry HPV at some point in their life. Typically the body will clear HPV on its own, but in cases where the virus persists for a longer period of time, it can cause changes in the cells on the cervix which eventually lead to cervical cancer.
1 Reference: https://www.cancer.org.au/cancer-information/types-of-cancer/cervical-cancer