I forgot to save seeds from a favorite heirloom tomato. But I did freeze some tomatoes raw & whole. Will the seeds germinate after they have been frozen in whole tomatoes ?
Were the tomatoes fairly low in moisture when you froze them?
Tomato seeds need to be dry to germinate. I have heard from others that sometimes you might get lucky if the tomatoes were frozen with low moisture. Some also have had some luck with the frozen seeds that were higher in moisture content.
Save the seeds, let them dry. Put a few in a sealed glass jar after drying. In the jar put a damp (not dripping wet) folded paper towel. See if any germinate. This will give you some idea as to the germination rate.
You can also just start a bunch of seeds in a starter pot next spring and of course keep the germinated one.
Best of luck to ya.