How to increase rizq? We are currently in a difficult financial situation.

Taqwa, keeping the ties of kinship, much istighfar and du'a, and taking the worldly means seriously by working and earning. Allah Jalla wa 'Ala says, the meaning of which is: "And whoever fears Allah, He will make for him a way out, and will provide for him from where he does not expect" (Surah al-Talaq, ayat 2 to 3), and Imam Ibn Baz said that istighfar and repentance are from taqwa.