Ah, Guavas...
This doesn’t look like ‘Homestead’ (Ruby x Supreme)
Guava is among the toughest fruit to identify the cultivar of. The best situation is asking the source where they propagated it from. It may be from seed or vegetative propagation. The seed pattern can help identify the fruit as well. Taste test and acid / ascorbic acid levels would be more definite. I will review a few photos and see if any strike me as similar.
The true cultivar name of this varietal is ‘Homestead’, which is a hand polinated cross by George Ruehle of ‘Ruby’ x ‘Supreme’. Ruehle was a scientist at TREC Tropical Research Center in Homestead’s Redland, and also served as President of the Rate Fruit Council International, based in Miami, among being on the organization’s founders in 1955.