I wouldn't even attempt to overlay two images with such disparate perspectives. I'd take the frame I liked the best [the top one obviously in this case for the sky] & just HDR it.

This is Aurora HDR just at default settings. There are a million tweaks you could make to this, from hardly noticeable to "it hurts my eyes" - but we only have a tiny jpg to work on here; you'll do a lot better from the original image.

Evan Photoshop's Camera RAW can have a good go at pulling detail out of the darker areas - this, 2 minutes work pushing shadows, pulling highlights, then adding a bit of dehaze, sharpening & noise reduction - again, you need to do this on the original.
Photoshop doesn't have the micro-tonality contrast detailing of a dedicated HDR app, though, so it would be hard to get it as crisp whilst also lifting shadows.

There's nothing you can do for the sun itself - that's blown out. There is no detail to recover.
Oddly, the image shows fairly flat 205's right through, so something has already pulled those highlights back; there's still nothing there to recover from the posted image. This makes me think that, compared to your blended image, which does have detail there, something was used to 'fix' it at an earlier stage… which in fact 'broke' it.

Thinking about the blend - I decided what it perhaps needed was some more detail in the mids… so this was a quick go - basically contrast/clarity/haze changes, then lifting the overall lightness a little to compensate.