Hello,
Please take a look at the documentation for getting started: Set-up a project — LVGL documentation
You need to make a “display driver” for transferring what LVGL produces to the output of your connected display. I have used a Renesas RA6M3 in the past and got it running quite well on that, also works on an S5D9 with some changes. I have no idea how Renesas automotive works but it might be similar.
See these two topics: How to port LVGL to the RA6M3 processor?
, and: Using DMA to transfer to the screen's framebuffer