Generally for larger groups you are better to try to call 407-WDW-Dine. COVID-19 also brought on some changes in how Disney operated. For social distancing larger tables were split up, so you may want to get 2 smaller table groups that are as close as possible to the time frame of each other. Could be a table of 4 and table of 6. Four top tables tend to be the easiest to get, so it might be a table and 4 and two tables of 3. This is why calling makes it all easier, but the waits can be really long too.