you have a nice table and I really like your chairs, theyblook very comfortable. a few ideas for your table... a couple ideas with just some individual live flowers in multiple small size vases, yes you would need to change out but not as expensive as a full arrangement. also 3 boxwoods that can be faux, there are ver pretty faux boxwoods that look very real, a couple non floral options..

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Is this the formal dining room? Is it used daily? Will the center piece need to be something that is easy to move daily use or can it stay there and only be used occasionally?

Used occasionally, so it can stay the majority of the time.

You can never go wrong with a bouquet of fresh flowers in the perfect vase.

You have a lot of pretty glass and metal surfaces, in grid and lined-up patterns .... I’d keep the centerpiece simple and round. A runner/textile with some texture to soften up hard surfaces and just one or two wooden bowls, a round grouping of three vases, or as mentioned, fresh flowers.

Runner .... https://www.wayfair.com/kitchen-tabletop/pdp/gracie-oaks-archambault-table-runner-w002714185.html

Bowl: https://www.scullyandscully.com/home-decor/home-decor-accessories/vases-cachepots/murano-shell-bowls-ivory-brown.axd?gclid=EAIaIQobChMIofLlrcvL6QIVw8DACh253wyeEAQYCCABEgJkFvD_BwE

I agree with Jinx. Something round to break up the strong rectangular shapes of the table and light fixture, mirror and console.