the way theoretical seating works the seats will not all become available at the same time. The seat map will be very dynamic

some seats will open up, once as they get occupied more seats will be released. if the flight is not full some seats will remain blocked (with Y9 B9 H9 that is a possibility). as an example 30 C and 30 E and F are probably status passengers and the blocks next to them (30B and 30D) will be removed late in the process, if ever.

Assuming you are all on one booking. I suspect theoretical seating has your party lined up to be offered one of the blocks of 3 on rows 25 and 26