Even though Israel has a bilateral relationship with India, it would not go to the extend of bombing Pakistan's nuclear facility if it attacks India.
Israel exports critical defense technologies to India. The government of Israel has not given any such statement or commented about Pakistan's attack on India. In 2019, Israel had offered unconditional support to India to fight against terrorism. Dr. Ron Malka said that the world should fight terrorism and eliminate it by collaborating. So, they associate with India to share their knowledge and technique as they want to improve their partnership. Indian Air Force will be purchasing SPICE-2000 bombs from Israel in 2020. The weapons were earlier used in the Balakot airstrikes by the IAF.
Israel has a history neutralizing alleged enemy nuclear sites. Previously, Israel has bombed Iraqi and Syrian nuclear facilities in 1981(Operation Opera) and 2007(Operation Orchard/Operation outside The Box) respectively by means of covert airstrikes.
However, there have been no statements issued from Tel Aviv or any Israeli authorities on bombing Pakistan's nuclear facilities if the latter attacked India.