As a counterpoint I've been involved with several companies in recent years that did not have a particularly difficult time hiring similar candidates. The only clear difference was that these jobs were remote friendly.

It's impossible to say for sure from the outside but a few factors that might be making it difficult for you to hire:

- A lot of tech workers value remote work these days.

- You aren't based in a location with a large enough talent pool for the work you do.

- Your company doesn't pay as well as you think, or has other details that turn off some potential applicants.

- It could be variance. There's a lot of randomness in the job market.