Native American Southwestern Hand Thrown Artist Signed Landscape Vase Bowl Pot

Beautiful heavy Native American vase bowl pot. The outside feels like it isn’t glazed with landscape succulent cactus decoration. Inside has a contrasting dark glaze. Inside is stamped with a tree and letter F. Bottom is Artist signed but I cannot read it. Sinie F? I haven’t been able to identify the maker. Some minor scuff marks on outside matte finish Note: the glaze has some natural missed spots that look like chips in photos but there are no chips or cracks. If anyone knows about this piece, I welcome any input.