Uninstalling fedora 32 and fixing boot to run ubuntu 20

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1

Hello, I have a dual boot for fedora 32 and ubuntu 20. I finally decided to keep only ubuntu (I’m a regular Windows user and it makes my life easier).
But fedora is taking control of the efi bootloader, and although I changed this, I am now stuck with the loader.
I want to completely uninstall fedora and just run ubuntu 20.
What should I do before deleting the fedora partition?
How to make sure that ubuntu will start directly with grub2?

Thank you for your advice

2

Sad to see you go.

in any case, copy out all valuable files from your Fedora partition. Boot Ubuntu and use gparted and allocate all Fedora partitions to Ubuntu – that is, expand Ubuntu’s partitions to claim disk spaces formerly allocated to Fedora (assuming they’re all on the same drive). Then rebuild grub from inside Ubuntu using grub2-mkconfig