If you're looking to watch the series online, I can suggest a few options:
However, I couldn't find any official links to stream the series online. Aksharaya Watch Online
Search for "Aksharaya full movie official release" rather than just "watch online free" to find rental links. If you're looking to watch the series online,
Not yet. As of this writing, Netflix Sri Lanka’s library is limited for local content, and Amazon Prime focuses more on Indian regional films. However, licensing deals change. If you want to see Aksharaya on Netflix, use the "Request a Title" feature on their help page. Aksharaya Watch Online