On the label of the plant, there is a knife and fork with a line through it. Is the fruit not edible?
Citrus Calamondin Plant
Certified GKH Gardening Expert
Calamondin is an edible citrus fruit.
This is common to seed this type of label put on citrus trees from the grower.
Numerous chemicals are applied to the plants in greenhouse production.
If the tree has fruit now, it is best to remove those and Not consume those.
The new fruit that grows while in your care, would be safe to eat.
Here is a link with care information.