Your father has a loving mind and he would be quite emotional person even if he never reveals or expresses them.
The current time is moderately conducive to him, as per his chart and you need to take care of him especially from Oct-2022 onwards for some time till mid 2023, after which things would gradually normalise.
Follow professional medical advice as required and take care of him and gradually things would normalise in due course of time.
Taurus ascendant with the ascendant lord Venus posited in the second house conjunct Moon; Lord of ninth house Saturn posited in the fourth house conjunct Mercury.
Mercury major period ongoing with Saturn Sub Period till Oct 2023 and Mars SS Period from Nov 2022 till Jan 2023.