All Peppol BIS formats can be converted to other e-invoice formats.
Yes, Peppol can be converted to other e-formats. Qvalia can help you to convert your supplier invoices to other formats. The solution is available for subscribers to paid plans.
Please note that Peppol BIS 3 is a highly comprehensive format, and there is a risk that all information will not be included in the new format when converting.