My dad wa my mums first serious relationship, they were married 10 years and divorced when I was 5. She's been single ever since, which is nearly 30 years. At this point I think she is unlikely to meet anyone, I'm not sure she'd even know how to go about it, she hasn't dated since she was a teen, and is now nearly 60.
To be honest it is a bit of a worry, she's probably quite lonely, this year especially, and is a little more dependent on my sister and I for socialization. For instance, we are the only people who would buy her Christmas/ birthday gift, and have been since we were children, so theirs more of an obligation to make a fuss (more apparent when we were teens/ early 20, the supermarket flowers other teens got for their mums wouldn't really cut it).
Theirs also more of a need to visit (outside of lockdown) and phone, as if I didn't she could go weeks without having a meaningful conversation. Not usually a problem, I enjoy our chats, but it's a long drive so takes full day every weekend to visit, which can be difficult if I also have other stuff to fit in with kids or general life stuff. If she had a partner I wouldn't feel bad about giving it a miss some weeks, but I can't really leave her on her own.