Among other things we are using Retool for data quality improvement. A quite common use case in this type of work is merging similar or duplicated data in tables.
We therefore have a feature request for a component. Our idea would basically be like a form component but with 2 columns of checkboxes instead of inputs. The initial data could be pre-filled similar to how forms can be pre-filled if using a form_data_key. Based on which checkboxes are filled in it should populate a data object (either form, or recordUpdates) with the checked value, to be used in whatever integration you are using.