Unable to enchant the fishing rod with luck of the sea

I was playing with my friend and I thought it would be nice to enchant my fishing rod on an enchantment table, then I realized that I could only enchant it with unbreaking (as seen in the screenshots below). I tried to add a few bookcases, but it didn't do any good. My friend also tried but had no luck. I had to use commands to enchant it.

Although this isn't a major bug, it would be nice if you could fix this in 1.13.1.

Best regards, Kim.