Can parents not attend because their son is engaged?

Of course.

Engagement is mainly for parents of both men and women to discuss the follow-up matters of engagement together. Before getting engaged, they should arrange to meet. If the man's parents can't be present due to the epidemic, they can let representatives of other important relatives attend, or choose a good day in the future. Generally, before getting engaged, parents of both sides need to meet first to discuss the engagement. After the engagement is confirmed by both parents, both men and women can start their engagement preparations. The engagement date should be the same as the wedding date. Choose an auspicious day, which can be calculated according to the date of birth of the couple or directly according to the auspicious day of the calendar.