Reasons for the universe being finite:-
1.It is quite contrary to science to assume that universe is infinite when there is no proof.
2.It is illogical and irrational to think of infintism because it is not clear.
3. As we have only so far seen a fraction of the universe, it is possible that the universe is finite, but extremely huge,beyond human comprehension.
Reasons for the universe being infinite are:-
1.According to findings and research done for decades using hubble and Kepler space telescopes, no particular boundary of the universe has been found.
2.Thought about the universe leads us to infinitism because theres always the question of "then what?"
3.There is no other way in science or human thinking other than infinitism to solve this problem of the universe.
Hope I answered correctly!!