Link to images of Euonymus japonica. Click on images to enlarge. https://calphotos.berkeley.edu/cgi/img_query?where-taxon=Euonymus+japonica&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&title_tag=Euonymus+japonica

Could you give us more details i.e. the plant’s size, close up of new & older branches and a photo that show the whole plant. Also using your hand or a pencil, pen and hold it a against the leaves for scale. I’m wondering if yours might be something either Euonymus japonica or a cultivar in the Viburnum genus, perhaps the Viburnum awabuki ‘Chindo'(?). Again I’m purely speculating. Check out the included link below for images of Viburnum ‘Chindo’. Best wishes! https://shop.tomscreeknursery.com/products/12348544