Small dog jacket recommendations

TL/DR - looking for jacket recommendations for small dogs - something that is quick on and off, waterproof and has belly coverage

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I have a 7 month old yorkipoo who is getting thoroughly soaked every time we leave the house.

I got her a jacket with legs but it’s a bit of a nightmare to get on and off - especially when showers come on quickly (we live in Scotland) and she seems to turn into a dog / octopus hybrid whenever I go near her with the leg holes! She’s probably about 10 inches tall so even when it’s not raining she is soaked from wet grass. Are fleeces/jumpsuits the best option here?

If you have any recommendations for waterproof solutions that protect the belly but don’t involve wrestling a 4kg dog I would love to hear about it!