You can do something similar to Yisrael’s to do list as shown here.
https://www.wix.com/corvid/forum/corvid-tips-and-updates/example-todomvc
Or this one which might be a bit over the top for you.
https://www.wix.com/corvid/forum/corvid-tips-and-updates/example-wix-data-multiple-references
Otherwise, you will have to look at adding a repeater yourself.
https://support.wix.com/en/article/about-repeaters
If you want to have all text into one field in your dataset, then you can look at having a reference field.
https://support.wix.com/en/article/about-reference-fields-in-database-collections
https://support.wix.com/en/article/about-referencing-multiple-items-in-one-field