Is there any relevant evaluation board for this chip TJA1120
You can contact with NXP distributors for request this EVB if possible.
Distributor Network | NXP Semiconductors
From above link, confirmed there is EVB for this part but not too much you can try to contact with Distributor.
You can download it TJA1120 Automotive Ethernet PHY 1000BASE-T1, ASIL B and TC-10 | NXP Semiconductors
Perhaps you need sign NDA with distributor firstly.