The fact is, St Thomas’ globe model had a firmament. As did St Bedes’. Because they believed in Scripture and their model flowed from scripture as its origin.
Your snowglobe is the fairytale. St. Thomas, St. Bede, and also the medieval university textbooks, taught globe earth along with proofs for that position. The were the same proofs used for the Greek concentric sphere model and do not make any sense with your alleged "scriptural" model. They gave detailed descriptions of what they were talking about. Sphere means sphere. St. Thomas describes various meanings of "firmament" that he holds as compatible with Scripture in the Summa:
https://www.newadvent.org/summa/1068.htm. These include a firmament which is a sphere and in which were placed the stars, a sphere which encompassed the spherical earth, like in the Greek model. Accepting the existence of a firmament does not necessarily lead to belief in flat earth and it did not in the case of St. Thomas.
Doctors of the Church, St. Thomas and St. Bede, accepted the teaching of the Church Fathers, St. Augustine and St. Basil, that Scripture is silent on the shape of the earth. They turned to Greek science for the answer to that question. And we know they were right to do so because Pope Leo later taught this in an encyclical. He even included St. Basil's point that Scripture that appears to speak of the earth having a shape should be understood figuratively. This is magisterial teaching. (Which you are apparently disobeying.)
You can pretend that I am being a modernist and a feminist, but it is clear that I am following the teaching of Fathers, Doctors and Popes. And do you claim that all the many trads who believe in spherical earth geocentrism are modernists? This is a position that appeals to trads because it is the traditional Catholic position, not because trads are modernists. Your position is indefensible with logic and so you turn to personal attacks. You lack evidence and sound arguments and so you insult me. None of this convinces people who are sincerely seeking Catholic truth.