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There is an update for Catalina: https://support.brother.com/g/b/downloadlist.aspx?c=as_ot&lang=en&prod=dcpj515w_eu_as&os=10060
Please let me know if you need any help in this or would like to switch to Secure Remote Assistance for live technical assistance on your device.
You can print through the regular printing mechanism in mac. As for scanning you would do that through image capture. https://support.apple.com/guide/image-capture/scan-images-imgcp1004/mac