Update

LuaSnip/tex/math-commands.lua

@@ -119,6 +119,9 @@ return {
     }),
     { condition = tex.in_mathzone }
   ),
+  s(
+    { trig = "abs", regTrig = true, wordTrig = false, snippetType = "autosnippet" },
+  )
   s({ trig = "exp", snippetType = "autosnippet" }, {
     t("\\exp"),
   }, { condition = tex.in_mathzone }),

LuaSnip/typst/math-commands.lua

@@ -35,6 +35,13 @@ return {
   s({ trig = "lap", snippetType = "autosnippet" }, {
     t("laplace"),
   }, { condition = tex.in_mathzone }),
+  s(
+    { trig = "abs", snippetType = "autosnippet" },
+    fmta("abs(<>)", {
+      i(1),
+    }),
+    { condition = tex.in_mathzone }
+  ),
   s(
     { trig = "bar", snippetType = "autosnippet" },
     fmta("overline(<>)", {