RSS2 shows only 10 items

Hello. I have this RSS2 feed

but it only shows 10 items out of the 12 I have in my collection. Is there a parameter I can use to see all the items in the feed? Thank you.

The feeds are constrained by the "items per page" limit.

I don't believe you can alter than limit for, but you can get the later items, just in separate feeds: items/browse/2?output=rss2 is "page 2" of the feed.