Will there be a converter available for connecting one of the old MagSafe or MagSafe 2 power adaptor to the new MagSafe 3 port which is present in the newly released MacBook Pros? I haven't been able to find any yet.
Apple did release such a connector for converting between MagSafe and MagSafe 2:
MagSafe to MagSafe 2 Converter https://www.apple.com/shop/product/MD504LL/A/magsafe-to-magsafe-2-converter