People who attend Church says it is biblical to attend Church every Sunday, but it's not.
There is no command to do it, but we take it from example and necessary inference from the Scripture.
We should strive to follow the Scripture Examples of the early Church.
Examples of the 1st century Church Meeting, taking the Lord's Supper, and Giving on Sunday are shown in the scripture.
Acts 20:7..." Now on the 1st day of the week, when the disciples came together to break bread" tells us what was unique about the 1st day of the week. Unlike other days of the week, this was the day the disciples came together to partake of the Lord's Supper. We know its not referring to common meals because we don't eat once a week, and we already know the disciples often came together daily for common meals from Acts 2:46.
By stating " the First Day of the week" we are told the frequency in which this happened. It wasn't the 1st Sunday of each month or on Passover. It was a weekly gathering that occurred on the 1st day of the week. This is also confirmed in another aspect of worship, the collection. Collection is commanded on the 1st day of the week in 1Corinthians 16:1-2.
When the Church meets we should all be there, not forsaking the Assembly but exhorting one another Hebrews 10:25