Nothing beats an installed map done by the guys putting the tile in as well as some drone footage at that time.

After the fact sometimes wheat in the spring will be taller over tile lines. I had a partial field without any solid GPS references and just a roughly drawn hand map with a few dimensions mapped this way. I tagged the start and end of the runs as well as general layout of how it had been installed back in the 90's. My tiling guys came and we walked those lines with GPS to create a map. It was a great way to incorporate those earlier lines into the rest of the complete pattern tiling that finished that field.

Google earth is good but I am not sure if you can view multiple years/images

If you are looking for older lines check out this site.

https://www.historicaerials.com

Various imagery back to the 50's Some years lines show up better than others. At least you can get a pretty good idea of what is there for older tile and see areas that are chronically wet or drowned out.