KnowRoamingWrite a review
Cost-effective and reliable ways to stay connected in 200+ countries and territories. KnowRoaming is a brand owned by Telna Inc. that offers connectivity solutions around the world.
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eSIM data plans for Costa Rica
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I'm not sure KnowRoaming still offer their 1Gb 30 day eSIM, but it worked very well for me over Christmas 2021. Roams on Movistar towers which are commonplace in the tourist areas I went to at least.
Still an issue (on Android at least) that you need to buy the esim on a different phone/computer in order to display the QR code so that your actual phone can then read it.