Is your dad's place in a city? If so, your city may have a franchise agreement with local telecom providers that compel them to service any residential address in the city. If he's not in a city, there may be a county franchise agreement, although those are less likely to compel service at every address.
When you say the community he's living in, if that's an apartment community or some senior living community or condominum etc, those may be setup with a company or group ownership of the land and some of the structures, in which case it's really up to that management as to what telecom companies they accept and can get to provide services and under what terms.
But no, there's no general compulsory universal service for internet. You're closer to that for telephone and electricity. I don't think there are any areas in the US where there's competitive residential telephone wiring and there are few places with competitive cable wiring; it's capital intensive to network an area and it's hard to get a return on investment unless it attracts a lot of customers and it's hard to get people to switch if their current service is ok (or will be updated to be ok in response to another network overbuilding)
Depending on the size and composition of the community, it might be sensible to get a commercial internet connection and share it within the community, but that's probably a sizable effort as well.
Xfinity is Comcast’s brand name. Usually it is used to describe their cable service. If you can get Comcast cable you are in luck it is a quality, if premium-priced, product.
Comcast also resells mobile internet from Verizon, I thought they mainly targeted people who were already cable customers, not provide fixed wireless.
Can he get cable TV? Do any of his neighbors have it? That would at least be a starting point if you wanted cable internet.
0.2 mbps download and upload speed...
So your 4 potential wireline providers are XFinity(Comcast), AT&T, Spectrum(Charter)and Atlantic(Cogeco).
Some things I'd try. I'd ask all 4 ISPs to send someone to do an on-site review for service availability because serviceability addresses can be wrong.
If that doesn't help, there is a good chance one/all of those providers have received government funds in the past or near future [1] for deployment. They may be willing to deploy to this neighborhood but need a nudge to do so. I don't specifically know how to do that but the local public service commission might.
Also worth contacting are the FCC and the Department of Commerce’s National Telecommunications and Information Administration (NIST). The latter is overseeing the fund disbursal from the recently passed broadband infrastructure program. They should have a broad understanding how those dollars become deployments. More importantly, they may have sway with the ISPs or know who does.
I get that calling the feds might seem like a hail Mary, but I've had good experience (and education) from reaching out to the feds directly.
Elected representatives are another worthwhile consideration.
[1]https://crsreports.congress.gov/product/pdf/R/R46780