Oh, so it's a little snub blade that chops whatever is in the "hook" of the thing. Yeah, I'd remove it's bolt, sharpen it and if the bolt can't be put back replace it with another blot with some threadlocker, double-nut or peened end to set the spacing right so it doesn't pinch the mechanism.

My long reach lopers are pretty new by comparison. This kind of thing: https://www.bunnings.com.au/trojan-2-4m-telescopic-tree-pruner_p0242118 They still work a treat for having spend ten years living outside with the tools leaning on the back of the shed.