Create more hearts?

Like the original Yoshi's Island, clearing a level with maximum hearts (stars in the original) is a requirement for 100%. However, the original had a few ways to accrue additional stars - red eggs would drop 2 stars when broken, and the +10 Star and +20 Star item cards would allow you to top up if you reach the end of a level a few stars short.
Woolly World doesn't appear to have these two options, only allowing you to gain hearts through checkpoints or from item clouds. I've hit the end of a level several times with 15/20 hearts, whilst the last thing that spawned any were considerably earlier in the level. Are there any other ways to top up your hearts?
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What is the command to get extra hearts?
BackgroundStatus EffectHealth BoostDescriptionAdds additional hearts to your health bar. This is extra health that can not be replenished with food and disappear after the effect wears offEffect IconParticlesOrange particle effects appear floating around youGame Command/effect command1 more rowCan you give yourself more hearts in Minecraft?
Absorption is a status effect that pads the health bar with extra hearts.Ingrid Andress - More Hearts Than Mine (Lyrics)
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Images: Malte Luk, Victoria Emerson, Victoria Emerson, Victoria Emerson