IIRC the BX23 has a limited Cat 1 3-point hitch, the limitation being that it cannot lift implements as high as a standard Cat 1 hitch. Thus it requires implements designed specifically for sub-compact tractors. Woods, LandPride, and KingKutter all make PHDs for sub-compact tractors, as well as some others. Tractor Supply used to carry the KingKutter line, and still does in some locations, but the new CountyLine unit on their website appears to be a full-size unit. Note that CountyLine is TSC's private label, the products are actually manufactured for them by other companies.
Hope this helps, and good luck in your search.
Fred