This lockdown, the churches are not forced to close, but most have, out of concern for people’s safety.
Most are open at limited times for private prayer, and most places do services online. If your mum can’t cope with zoom, maybe you could help her with YouTube recorded service, where she can join in with the singing, watching it at any convenient time.
Some churches are holding services with limited numbers and social distancing, no coffee afterwards, no socialising.
My church is planning to reopen for Easter Sunday morning with Holy Communion. It will be great if we can, even though under restricted conditions, but a decision will be taken locally according to conditions at the time.