Hi @rexkenley ,
Could you please share a bit more about your issue?
Do you mean that the PCF control with a SingleLine.Text property and a Multiple property could not be shown up when you want to add it into your Entity form?
Further, could you please show more details about the Manifest.Input.xml file defined for your PCF control?
Please check if you have published your PCF solution file (zip file) into your current CDS instance. Please check the following article for more details:
https://docs.microsoft.com/en-us/powerapps/developer/component-framework/implementing-controls-using-typescript#packaging-your-code-components
Also please check if you have bind the PCF control to proper field within your Entity form. When you bind the PCF control to the field in Entity form, please consider edit the Entity form in classic mode, then double click the field you want to bind PCF control to, within the "Field Properties" panel, switch to "Controls" tab, then click "Add Control" option, check if the PCF control listed there.
In addition, please consider click "Custom Controls" within current solution, then check if your uploaded PCF control listed there. If the PCF control is not listed there, it means that you do not upload your PCF control into current CDS instance successfully.
Note: When you reference the PCF control in your Entity form, the name of the PCF control may be changed. The display name of the PCF control is not the Solution name, it should be the "display-name-key" value of the <Control> tag defined within your Manifest.Input.xml file

Best regards,