A Font would be required to replace standard Hindi झ with standard Nepali झ (different shape). Modern Nepali Preeti-based Fonts do help but the Dotted consonants used in Hindi like क़, ख़, ग़, ज़, झ़, ड़, ढ़, फ़ don't exist in them.
We need a Tiro Devanagari Nepali font with everything being same as Tiro Devanagari Hindi but replacement of shape of झ with Nepali style.
This font would be specifically used for Hindi, Nepali, Bhojpuri, Maithili, Awadhi, Rajbongshi/Kamtapuri, Kumaoni, Garhwali and Doteli. It will serve users in India, Nepal and Bangladesh.
Tiro Devanagari Nepali.pdf