They have them, they just dont show up when they search for them for some reason. Season 1 and Season 2.

I've just never seen Lucifer on Blu-Ray in stores, which is why I suggested DVD first.

https://www.amazon.com/Lucifer-Complete-Second-Season-Blu-ray/dp/B0744VLDKB/ref=mp_s_a_1_2?keywords=lucifer+season+2&qid=1557897601&s=gateway&sprefix=lucifer+&sr=8-2

https://www.amazon.com/Lucifer-Complete-Third-Season-Blu-ray/dp/B07FPK5WS6/ref=mp_s_a_1_fkmrnull_1?keywords=lucifer+season+3+bluray&qid=1557897675&s=gateway&sprefix=lucifer+season+3&sr=8-1-fkmrnull

Hope this helps