Here Today (2021)

Billy Crystal (co-) wrote, directed, and starred as a comic writer (Charlie Burnz) who is starting to have memory problems, not merely due to aging, but dementia. He meets much younger Emma Payge at a restaurant, believing that she has "won" time with him by being the highest bidder at "22" for a fund raiser. Emma lets him know that she did not do the bidding and is merely filling in for someone who didn't want to meet and spend time for him. And the high bid was not for $2,200... it was $22.
At first, Charlie and Emma do not get along very well. Emma notices that Charlie has photos of his family members on a wall with their names underneath, which he explains away by telling her it helps him focus when he is writing. (Charlie has strained relationships with his family members.) But Emma eventually realises Charlie has memory lapses and becomes concerned. Charlie has an accident and goes to the emergency room. Emma, telling the doctor she is Charlie's adopted daughter from another country, learns Charlie's real fate - Charlie does not have long before he won't even recognize who his family members are.
Emma takes it upon herself to move in with Charlie and take care of him. An unlikely friendship - somewhat romantic - develops, and Emma helps Charlie enjoy the remaining time he has. Emma also informs his adult children of his situation and why they should not be angry with or disturbed by her residing with Charlie.
The movie is "different" and would most likely appeal to older viewers and/or people dealing with a loved one who has dementia. It is supposed to be a comedy, but, well, it is up to the viewer to decide if it is funny.

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