Among the works you listed, the ones composed in Sanskrit are:

1. Upamitibhava Prapancha Katha – by Acharya Siddharshi Gani, an allegorical Jain mahākāvya in Sanskrit. ( openlibrary.org)
2. Tattvartha-sutra – by Acharya Umasvati/Umaswami, the foundational Jain Darshan text in Sanskrit. ( pwonlyias.com)
3. Shantinatha Charitra – Jain epic/charitra on the 16th Tirthankara Shantinath, in Sanskrit. ( pwonlyias.com)
4. Adipurana – part of Mahapurana by Acharya Jinasena (Digambar), in Sanskrit. ( en.wikipedia.org)
5. Samantabhadra’s works (Digambar Acharya) – e.g. Ratnakaranda Shravakachara, Aptamimamsa – in Sanskrit. ( pwonlyias.com)
6. Acharya Jinasena’s works (Digambar monk) – especially Adipurana and Harivamshapurana, forming the Mahapurana, in Sanskrit. ( en.wikipedia.org)
7. Parshvabhyudaya Kavya – by Acharya Jinasena, a celebrated Sanskrit kāvya on Bhagwan Parshvanath. ( jainqq.org)
8. Ashtalaksmi – the famous multi-meaning (anekārthika) single-verse composition by Mahopadhyaya Samaysundarji, in Sanskrit. ( jaingpt.org)
9. Saptasandhana Mahakavya – by Upadhyaya Meghavijaya, an anekārthika Sanskrit mahākāvya intertwining seven narratives. ( jainqq.org)

Not primarily in Sanskrit:

• Siri Bhalaya / Siribhoovalaya – a unique Jain work by Kumudendu Muni written in Kannada numerals, encoding texts in many languages (Kannada, Sanskrit, Prakrit, etc.), but it is classed mainly under Kannada / multi-lingual numeric literature, not as a straightforward Sanskrit text. ( en.wikipedia.org)