Use the stix package in your LaTeX document to create below equal symbols
\usepackage{stix}
Equals Sign

=

=
Equal to By Definition

\eqdef

\eqdef
Measured By

\measeq

\measeq
Questioned Equal To

\questeq

\questeq
Not Equal To

\neq

\neq
Identical To

\equiv

\equiv
Not Identical To

\nequiv

\nequiv
Strictly Equivalent To

\Equiv

\Equiv
Equivalent To

\asymp

\asymp
Geometrically Equivalent To

\Bumpeq

\Bumpeq
Difference Between

\bumpeq

\bumpeq
Approaches the Limit

\doteq

\doteq
Geometrically Equal To

\doteqdot

\doteqdot
Approximately Equal to or the Image Of

\fallingdotseq

\fallingdotseq
Image of or Approximately Equal To

\risingdotseq

\risingdotseq
Colon Equals

\coloneq

\coloneq
Equals Colon

\eqcolon

\eqcolon
Ring In Equal To

\eqcirc

\eqcirc
Ring Equal To

\circeq

\circeq
Corresponds To

\arceq

\arceq
Estimates

\wedgeq

\wedgeq
Equiangular To

\veeeq

\veeeq
Star Equals

\stareq

\stareq
Delta Equal To

\triangleq

\triangleq
Equals Sign and Slanted Parallel

\eparsl

\eparsl
Equals Sign and Slanted Parallel with Tilde Above

\smeparsl

\smeparsl
Identical to and Slanted Parallel

\eqvparsl

\eqvparsl
Gleich Stark

\gleichstark

\gleichstark
Equals Sign with Dot Below

\eqdot

\eqdot
Identical with Dot Above

\dotequiv

\dotequiv
Double Colon Equal

\Coloneq

\Coloneq
Two Consecutive Equals Signs

\eqeq

\eqeq
Three Consecutive Equals Signs

\eqeqeq

\eqeqeq
Equals Sign with Two Dots Above and Two Dots Below

\ddotseq

\ddotseq
Equivalent with Four Dots Above

\equivDD

\equivDD
Equals Sign with Bumpy Above

\bumpeqq

\bumpeqq
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