It is an accurate score.
However it is derived by using your Equifax credit data and applying the FICO Bankcard Score 8 model. This scoring model differs from the basic FICO Score 8 model and can vary substantially as a result. For example, the Bankcard Score 8 model ranges between 250-900 while the traditional FICO Score 8 model tops out at 850.
All Fico scores are accurate at the time they're generated. There's no such thing as an inaccurate Fico score. The only thing that can make it inaccurate is if it's old. For example, if a score was generated 25 days ago and a ton has changed on your profile since then, while it was accurate 25 days ago it may not be an accurate representation of your profile/score today.