You can program them via NFC. I use this app https://play.google.com/store/apps/details?id=com.wakdev.wdn... which can do it for free and has lots of neat NFC tools.

Programming NXP NTAG21x tags works on most recent iPhones too. Two apps I successfully used are "NFC Tools" and "NFC TagWriter by NXP". You can also associate the tags with Shortcuts and with automations in Home Assistant.