We need support kintone basic auth. Because using Power Automate during kintone IP address auth.
cybozu.com Basic Authentication
cybozu.com IP Address Restrictions
You can free some addresses on the kintone side to let requests from Power Automate to get through the IP restrictions.
Here are some links for reference
English (for kintone.com environments): https://www.kintone.com/extensions/power-automate/
Japanese (for cybozu.com environments): https://developer.cybozu.io/hc/ja/articles/360000361506#step7
Thank you for your advice (japanese info is useful to me).
According to this information, for now we have no choice but to set an IP address for security reasons. However, I think it's simpler to use basic authentication. Because the IP address of Power Automate may change in the future. And since there are many IP addresses, it takes deal to set up. That's why I'd like to have basic authentication (preferably token too) support.