Hello and welcome to OSM.

These should be mapped as landuse, not leisure.  You mapped it similar to a bunch of individual garden attractions, kind of like a bunch of individual botanical gardens.

This is the correct tag to use:
https://wiki.openstreetmap.org/wiki/Tag:landuse%3Dflowerbed
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            Published using OSMCha: https://osmcha.org/changesets/165136452
            