I will not comment on the stay at the Finca Robusto as this is, as confirmed by many, as excellent.
I will make some observations on the present Covid situation.
Flight to and back to Holland was uneventful and on the airports and flights there was ample space and distance by all. On the Finca premises there was no issue at all.
In Javea and area around, it was not so busy as expected this time of year and you could easily keep distance. You have to walk around with masks but one gets used to it. In the restaurants you can take it off and also there the owners are very responsible in their approach (distance, hygiene, etc). We felt well by the ability to control ourselves the distances and crowds. So I would say go there and keep your normal senses and enjoy.