I think the term “advanced beginner” is used to differentiate those riders from an absolute beginner. There is a difference.
OP, if people are asking you to define your level of riding, state what you are able to do, and say, that since you know that there is much for you to learn, you consider yourself a beginner. It is much better to underestimate than to overestimate.
When and if these people see you ride, it is better for them to be pleasantly surprised at your ability then to disappointed.
Don’t be too concerned about labels. Just keep riding and learning and have a good time.