There are plenty of options for the EA3 (590) rims [MENTION=475143]LifeNovice1[/MENTION] . Your best bet would be online shopping to get the best variety. I like the Schwalbe Delta Cruisers. They are available in different colors and with more or less puncture protection. There are other tires too.

Kenda K40 for a budget tire.

Schwalbe Marathon for a more substantial tire at a more substantial price.

Schwalbe Delta Cruiser in creme for a different look. It is also available in black, tan wall and I believe all of them have a reflective sidewall. In creme, the reflector is harder to see unless you shine a light on it.

Kenda K40 with a reflective sidewall and puncture protection.

There were millions of bikes made with this wheel size. All the English three-speeds had this wheel size and many American bikes like the Murray pictured above and the Murray built Free Spirit had this wheel size. At 1-3/8" wide it gives a nice ride with lower inflation pressures than typical with 27" and 700C tires.

If you get a Schwinn Racer, Collegiate or Speedster with the S-6 rims, there are these Sunlight Street S-6 . They look like the original Schwinn branded tires with ribbed treads and tan walls. So, even if you get the Schwinn with the Schwinn specific tire, it is still available even in these times of shortages of everything.

Good luck with your search and post pictures when you get your bike.