Can you elaborate on that, please? I had a chance to see different opinions on that matter.
I suppose everything depends on whom you ask, and what you mean by "Did Rome accept the Quinisext Council via the Seventh Ecumenical Council?"
If you mean "did they in actual practice," then the answer is no. The Quinisext canons are not part of RC canonical corpus. End of story. For the average practicing RC canonist, they are a mere footnote. When Holy Cross had its big symposium on Quinisext, the Roman Catholic participant, an eminent canonist and scholar, had to prepare himself for the conference by reading the text of the canons for the first time
If you mean "does the wording of Canon I of Nicaea II mean that Rome used to accept them," the answer is less clear. Canon I also states that everyone must accept the Apostolic Canons. However, there were various versions of the Apostolic Canons, and Rome's collection was substantially shorter than the Eastern one. So, has the East agreed to jettison some of the Apostolic Canons via Canon I, or has Rome agreed to add some? Neither, in reality. Local churches accept or reject or interpret canons like this as it suits them.
In the current day, if you check the Conciliorum Oecumenicorum Decreta
, it doesn't even bother to print the Quinisext canons, preferring just to say they "have been regarded as decrees of an ecumenical council in eastern canon law; their approval by the pope is disputed." Hardly a mention.