u/JasonDevs

[…] there are now 3 ways to meet this requirement:

1. Pay a one-time, refundable publishing fee of 1,000 Robux per game OR
2. Have received free Roblox Plus for 6 months(Check your publishing permissions for a green banner to see if you qualify) OR
3. Have a Plus/Premium subscription for 2 consecutive months.

https://devforum.roblox.com/t/alternate-publishing-requirements-for-roblox-kids-and-select/4630944